2007–2009: First doubles title In 2007 Kubot's two main-draw wins came in Davis Cup ties. In 2008 Kubot did not play a single main-draw match. Kubot started 2009 by competing in the qualifying rounds of
Qatar ExxonMobil Open and the
Australian Open, but he fell in the final round. He then qualified for the
Brasil Open, where he recorded his first main-draw win in over one and a half year against
Daniel Gimeno Traver, but lost in the following round to
Thomaz Bellucci. He then continued to play in qualifying, but failed to qualify. However, in the
2009 Serbia Open, he fell in the final round of the qualifying draw, but was granted a
lucky loser spot after
Steve Darcis withdrew due a shoulder injury. He defeated
Arsenije Zlatanović,
Igor Andreev,
Kristof Vliegen, and an upset victory over second seed
Ivo Karlović. He then lost in straight sets against World No. 3 and top seed
Novak Djokovic, in his first final. He became the first Pole to reach an
ATP final in 26 years (since
Wojciech Fibak in 1983). He also reached the doubles final at the same event partnering
Oliver Marach, which he won. At
Roland Garros, he qualified, but lost to
Viktor Troicki in the first round, in just around 4 hours. His next main-draw appearance came in
MercedesCup in
Stuttgart, where he recorded wins over
Pablo Andújar and
Philipp Kohlschreiber, but lost to
Nicolas Kiefer in the quarterfinals. He then qualified in
Cincinnati, but lost to
José Acasuso, in the first round. In
Beijing, he recorded the biggest win of his career by upsetting
Andy Roddick in the very first round, but lost to
Ivan Ljubičić the following round. He then lost in the first rounds of
Shanghai and
Vienna. In the
2009 BNP Paribas Masters, he defeated
Andreas Beck, but lost to
Marin Čilić, after qualifying. In doubles, he won the
2009 Grand Prix Hassan II, the
2009 Serbia Open, and the
2009 Bank Austria-TennisTrophy, all with his regular doubles partner
Oliver Marach. They also reached the semifinals of the
2009 Australian Open, losing to
Mahesh Bhupathi and
Mark Knowles. They were able to qualify in the
2009 ATP World Tour Finals, falling in the round-robin stage despite winning two matches over the teams of
Max Mirnyi and
Andy Ram, and
Lukáš Dlouhý and
Leander Paes, only losing to
Bob Bryan and
Mike Bryan 2010: Three doubles titles Kubot started his 2010 campaign in
Doha, where he reached the quarterfinals, losing to
Viktor Troicki, after recording straight-set wins over
Karim Maamoun and
Sergiy Stakhovsky. He then played in the
Australian Open, where he reached his first fourth round in a Grand Slam tournament. He earned this spot by defeating
Mischa Zverev, and
Santiago Giraldo, and through the withdrawal of 20th seed
Mikhail Youzhny. He was defeated by
Novak Djokovic. In the
Movistar Open, he lost to
Marcel Granollers, after defeating
Horacio Zeballos. In the
2010 Brasil Open, he reached the final, his second of his career. He earned that by defeating
Óscar Hernández,
Albert Montañés, and
Fabio Fognini, in straight sets. He came back against fourth seed
Igor Andreev in the semifinals. In the final, he lost to top seed
Juan Carlos Ferrero, failing to hold serve in the whole match. He then suffered early losses in his next three tournaments to credible players in the
2010 Copa Telmex, losing to
Juan Mónaco, in the
2010 Abierto Mexicano Telcel to
Fernando Verdasco, and the
2010 BNP Paribas Open to
David Nalbandian. He then regained form, reaching the quarterfinals of the
2010 Grand Prix Hassan II, losing to
Potito Starace. However, he lost in the first round of the
2010 Monte-Carlo Rolex Masters to
Viktor Troicki. In doubles, he won the
2010 Movistar Open in
Santiago, the
Mexican Open (tennis) in
Acapulco, and the
Romanian Open Trophy in
Bucharest.
2011: Fourth round at Wimbledon At the
2011 French Open, Kubot was down two sets to none in his first-round match against 11th seed
Nicolás Almagro. Kubot stormed back and won the match in five sets. He progressed to the third round, before he was ousted. He earned the nickname "Lukasz the Lionhearted" for his aggressive style of play. He then qualified for the
2011 Wimbledon Championships and advanced to the fourth round, defeating
Arnaud Clément in five sets,
Ivo Karlović in straight sets, and
Gaël Monfils in four sets. In the fourth round, he led
Feliciano López by two sets to love and had two match points in the third set tiebreak, but eventually lost in five sets.
2012: Stuttgart Open doubles title Kubot made the quarterfinals in Memphis, before losing to
Benjamin Becker. He also reached the quarterfinals in Bucharest, losing to
Gilles Simon. Kubot reached the third round of the French Open, losing to Belgian
David Goffin. Kubot made the quarterfinals in Gstaad, where he lost to
Grigor Dimitrov. At Winston-Salem, he made the third round, losing again to Goffin. In doubles, he made three finals, including the Masters 1000 event in Rome, partnering
Janko Tipsarević. He won the tournament in Stuttgart, partnering
Jérémy Chardy.
2013: Wimbledon quarterfinal Ranked no. 130 in the world, Kubot reached the quarterfinals of
2013 Wimbledon Championships. He defeated
Igor Andreev in the first round before getting a walkover after second round opponent (and conqueror of
Rafael Nadal in the first round)
Steve Darcis withdrew through injury. He then defeated
Benoît Paire and
Adrian Mannarino before losing in an all-Polish slam quarterfinal against
Jerzy Janowicz.
2014: Australian Open doubles title In January Kubot and Sweden's
Robert Lindstedt won the
Australian Open men's doubles title. The pair had played just two tennis tournaments together, losing in the first round of both, before entering the Australian Open. In the final they defeated American
Eric Butorac and South African
Raven Klaasen, who had knocked out top seeds
Bob Bryan and
Mike Bryan. Lindstedt said he had been slated to play with
Jürgen Melzer, but the Austrian withdrew with injury before the tournament. "I had to scramble up a partner in December and I'm thankful that Kubot said yes", stated Lindstedt.
2016: Third Vienna Open doubles title and race to Rio , 2016
Vienna Open Champions In August Kubot participated in the
2016 Summer Olympics in
Rio de Janeiro, Brazil. Partnered with
Marcin Matkowski, he defeated Indian tennis pair of
Leander Paes and
Rohan Bopanna. Subsequently, Kubot and Matkowski lost to the eighth seeded Spanish pair of
Roberto Bautista Agut and
David Ferrer in the second round. Kubot also participated in the mixed doubles, where he was partnered with the
2015 WTA Finals winner,
Agnieszka Radwańska. Radwańska and Kubot lost to the Romanian pair of
Irina Camelia Begu and
Horia Tecău in the first round. In October, Kubot partnered with
Marcelo Melo defeated
Oliver Marach and
Fabrice Martin to win the
Vienna Open Doubles Title for the third time in his career.
2017: Wimbledon doubles title and year-end No. 1 ATP doubles ranking In March Kubot with his doubles partner
Marcelo Melo reached the doubles final at
Indian Wells Masters. Eighth-seeded Łukasz Kubot and Marcelo Melo reached the BNP Paribas Open semi-finals after breezing past tricky wild card duo,
Nick Kyrgios and
Nenad Zimonjić. The Polish-Brazilian pair then defeated fourth seeds
Jamie Murray and
Bruno Soares to reach the final against the 6th seeds, South Africa's
Raven Klaasen and his American doubles partner,
Rajeev Ram. At the
2017 Miami Open Kubot and Melo dropped only three sets en route to the final to reach their second straight ATP Masters 1000 final. The sixth-seeded Kubot and Melo defeated American duo
Nick Monroe and
Jack Sock in straight sets. It was their first ever Masters 1000 title won as a team. Kubot and Melo have continued their streak of claiming at least one ATP doubles title together in a season for the third straight year. They are back-to-back Vienna doubles champions, having won the tournament together in 2015 and 2016. Miami Open was their 11th career tournament together, with a current overall 22–8 record and 12–6 record in 2017. In April, Kubot and Melo reached the quarter-finals at the
Monte-Carlo Masters, the season's third Masters 1000 tournament. The following month they reached their third ATP World Tour Masters 1000 final of the season after they defeated seventh seeds
Ivan Dodig and
Marcel Granollers at the Mutua
Madrid Open (tennis). In the Mutua Madrid Open final they defeated French duo consisting of
Nicolas Mahut and
Édouard Roger-Vasselin to win their second Masters 1000 doubles title this season. Seeded fourth at the
French Open Kubot and Melo overcame a first round challenge from
Julien Benneteau and
Jérémy Chardy to advance to the second round. In the 2nd round they lost to
Ryan Harrison and
Michael Venus. Kubot and Melo continued their fine season by taking the doubles title at the
Ricoh Open, living up to their top seed status in
's-Hertogenbosch by defeating second seeds
Raven Klaasen and
Rajeev Ram. As top seeds Kubot and Melo continued their dominance on grass courts by taking the doubles title at the
Gerry Weber Open in
Halle, outlasting brothers
Alexander Zverev and
Mischa Zverev. Their victory in Halle also further extended their lead in the Emirates ATP Doubles Race To London. They stayed perfect on the grass courts, ousting top seeds
Henri Kontinen and
John Peers in the
Wimbledon semi-finals. In the Wimbledon final, the fourth seeds defeated 16th seeds
Oliver Marach and
Mate Pavić. The final lasted a marathon 4 hours 41 minutes and was only the fourth Wimbledon men's doubles final to go to five sets in the last 20 years. In November Kubot and Melo won the men's doubles title at the
Paris Masters tennis tournament. The pair defeated Ivan Dodig and Marcel Granollers in the final. The Polish-Brazilian duo made the final after easing past
Jamie Murray and
Bruno Soares in the semifinal and
Feliciano López and
Marc López in the quarterfinals. The Paris victory marks Kubot and Melo's sixth title of the season, after wins at Wimbledon, Miami, Madrid, Halle and s'Hertogenbosch. Following the Paris Masters Kubot officially moved up to world No. 2 in the Association of Tennis Professionals’ (ATP) doubles rankings. At the Nitto
ATP Finals top seeds Kubot and Melo outclassed No. 7 seeds Ivan Dodig and Marcel Granollers to clinch year-end No. 1 ATP doubles ranking. "This year has been amazing for me and Lukas, the first year we're playing together. Finishing as the No. 1 team in the world for me, it means a lot", Melo said, "We achieved this as a team. I'm very proud". They also defeated four-time former season finale champions
Bob Bryan and
Mike Bryan and subsequently qualified for the semi-finals. In the semifinal they knocked out eighth seed
Ryan Harrison and
Michael Venus for a place in the title match. In the final Kubot and Melo, who were 49-17 for the season, fell to second seeds and defending champions
Henri Kontinen and
John Peers.
2018: World No. 1 in doubles, tied with Marcelo Melo At the start of the season top-seeds Łukasz Kubot and Marcelo Melo defeated
Jan-Lennard Struff and
Viktor Troicki to capture the
Sydney International men's doubles title. Following Sydney Kubot attained No. 1 in the ATP Doubles Rankings, and has become the 51st player since 1976 to reach the pinnacle of the sport. "It's great for Poland", said Kubot. "I’m happy that I’m one of the ambassadors for tennis in my country, putting Polish tennis on the map of the world. I’m grateful to
Wojtek Fibak, who was No. 2 in doubles (1979) and Top 10 in singles (1977). He gave me a lot of advice from his experience, and motivation". Top seeds Kubot and Melo advanced to the
Australian Open quarter-finals after coming from a set down to beat 16th seeds
Rajeev Ram and
Divij Sharan. Unbeaten in 2018, they lost to
Ben McLachlan and
Jan-Lennard Struff in the quarterfinal. In Halle, Marcelo Melo and Łukasz Kubot—who went undefeated on grass last year—defended their title, beating Alexander and Mischa Zverev in the final. It was Melo and Kubot's first title victory since January in Sydney. At Wimbledon, seeded second, Kubot and Melo lost to
Jonathan Erlich and
Marcin Matkowski in the second round. Fifth seeds Kubot and Melo advanced to the quarter-finals of the
Western & Southern Open for the second year in a row, beating
Rogers Cup finalists
Raven Klaasen and
Michael Venus. The Polish-Brazilian duo avenged a loss they suffered against the same team one week ago in Toronto. In the quarterfinal Kubot and Melo lost to fourth seeds
Jamie Murray and
Bruno Soares, who triumphed in Acapulco and Washington, D.C. earlier this season. It was the first Head2Head meeting between the two teams this year. Seeded seventh at the
US Open, Kubot and Melo defeated
Divij Sharan and
Artem Sitak in the second round. In the third round they overpowered the
2018 French Open champions
Nicolas Mahut and
Pierre-Hugues Herbert. They continued their great form with a straight set win over
Austin Krajicek and
Tennys Sandgren to reach their first US Open semifinal. In the semifinal they defeated
Malek Jaziri and
Radu Albot for a spot in the final of the Men's doubles event at the
2018 US Open. Kubot and Melo came into the tournament having lost five of their previous seven matches and also ended up losing to the third-seeded Americans
Mike Bryan and
Jack Sock in the final. No. 2 seeds Kubot and Melo beat top-seeded
Oliver Marach and
Mate Pavić in the
China Open final to claim their third team title of the season. Following China Open they also won the Rolex
Shanghai Masters doubles title. In the Shanghai final they defeated sixth-seeded
Jamie Murray and
Bruno Soares to continue their strong form and win back-to-back titles. For the second consecutive season Kubot and Melo qualified for the Nitto
ATP Finals at
The O2 Arena in London. No. 3 seeds Kubot and Melo secured a spot for the prestigious season-ending event after beating second-seeded Oliver Marach and Mate Pavić in the Rolex
Shanghai Masters semi-final. Kubot and Melo were eliminated from the ATP Finals despite winning their final match against top-seeds Oliver Marach and Mate Pavić. For the third time in his career Kubot ended the season in the top 10 ATP doubles ranking at No. 9.
2019: Kubot's 25th doubles title and 6th ATP doubles finals appearance At the start of the season Kubot's partner Marcelo Melo was sidelined from
Australian Open due to suffering a back injury. As a result, Kubot played doubles partnered with
Horacio Zeballos. Kubot and Zeballos defeated
Aljaž Bedene and
Maximilian Marterer in the first round and
Fabrice Martin and
Jérémy Chardy in the second round. In his fifth career Australian Open doubles quarterfinal Kubot and his partner lost to
Ryan Harrison and
Sam Querrey in three sets. At the
2019 BNP Paribas Open sixth seeds Łukasz Kubot and Marcelo Melo rallied past
Wesley Koolhof and
Stefanos Tsitsipas in first round and defeated
Nick Kyrgios and
Taylor Fritz to reach the quarterfinal. They battled past
Dominic Inglot and
Franko Škugor in one hour and 23 minutes and defeated
Novak Djokovic and
Fabio Fognini for a spot in the final. Runners-up in 2017, Kubot and Melo lost a tight finals match to
Nikola Mektić and
Horacio Zeballos. Top seeds Łukasz Kubot and Marcelo Melo broke three times to return to the
2019 Miami Open semi-finals. The 2017 champions, swept fifth seeds
Oliver Marach/
Mate Pavić before falling to
Bob Bryan/
Mike Bryan in the last four. In August top seeds Kubot/Melo won their first ATP Tour team title of 2019. The Polish-Brazilian pairing beat American wild cards
Nicholas Monroe and
Tennys Sandgren to claim the
Winston-Salem Open championship, their 13th doubles crown together. At the
China Open Kubot and Melo recorded their sixth straight victory beating
Mao-Xin Gong and
Ze Zhang to reach the semi-finals. The defending champions claimed 82 per cent of first-serve points (27/33) and did not face a break point to advance after 68 minutes. Without dropping a set throughout the entire tournament the Polish-Brazilian duo defeated
Karen Khachanov and
Andrey Rublev for a place in the championship match. In the final they lost to
Ivan Dodig and
Filip Polášek. At the
2019 Rolex Shanghai Masters Kubot and Melo rolled past
Nicolas Mahut and
Édouard Roger-Vasselin to reach their third consecutive final-round appearance in Shanghai. In the final they lost to
Mate Pavić and
Bruno Soares. Despite that loss they became the second team to qualify for the
Nitto ATP Finals following their quarterfinal win at the Shanghai Masters. In October top seeds Łukasz Kubot/Marcelo Melo defeated third seeds
Pierre-Hugues Herbert/
Nicolas Mahut to reach their second final at the
2019 Erste Bank Open in Vienna. In the championship match Kubot/Melo lost to the fourth seeds
Rajeev Ram/
Joe Salisbury. The 2015 Vienna champions had not dropped a set en route to their sixth ATP Tour doubles final of the season and had won 16 of their past 19 matches. At the Nitto
ATP Finals Łukasz Kubot and Marcelo Melo made a winning start to Group
Jonas Björkman after beating
Ivan Dodig and
Filip Polášek. Kubot and Melo hit seven aces, won 76 percent of their first serve points in an hour and 40 minutes of play. They reached their second team semifinal at The O2 Arena after edging out
Rajeev Ram and
Joe Salisbury to finish Group Jonas Björkman with a 2–1 record.
2020: Kubot's 27th doubles title In February second seeds Kubot and Melo saved two championship points to defeat top seeds
Juan Sebastián Cabal and
Robert Farah to win the
Mexican Open title in
Acapulco. This was their 13th ATP Tour team doubles title and the first of this season. Kubot also enjoyed another milestone in Acapulco by picking up his 400th tour-level doubles victory. He accomplished the feat in the semi-final win against
Nikola Ćaćić and
Dušan Lajović. In October top seeds Kubot and Melo beat third seeds
Raven Klaasen and
Oliver Marach to reach the
2020 Bett1Hulks Championship final in Cologne. In the final the Polish–Brazilian duo lost to second seeds
Pierre-Hugues Herbert and
Nicolas Mahut. Kubot and Melo continued at the
Vienna Open where they defeated
Jamie Murray and
Neal Skupski to win the title. It is the third time that the veteran Polish-Brazilian duo has won the Erste Bank Open title as a team and it was their 15th tour-level title together. In November, Kubot and Melo played at the
2020 Rolex Paris Masters where they lost to
Félix Auger-Aliassime and
Hubert Hurkacz in the semifinal. Next they participated in their fourth straight team appearance at the
Nitto ATP Finals in London. The Polish-Brazilian duo qualified for the event by defeating
Pierre-Hugues Herbert and
Nicolas Mahut in the Paris quarter-finals. Łukasz Kubot and Marcelo Melo finished their 2020 ATP Tour season and four-year partnership with a victory over
Wesley Koolhof and
Nikola Mektić in the Nitto ATP Finals. They ended their fourth straight team appearance at The O2 with a 1-2 round-robin record. After the match, both Kubot and Melo were emotional. Melo confirmed it was their last match as a tandem on Instagram, writing: "Thanks Kubi! We had many good emotions during our partnership, today was not different. We end our team but we keep friends forever!" Kubot said. "We are very happy and pleased that this is here in London, because we have one of the best memories here from winning Wimbledon." Kubot and Melo ended the season with a 21–13 team record. The Polish-Brazilian tandem claimed two ATP 500 titles in Acapulco and Vienna. They lifted 15 tour-level trophies during their partnership, including at 2017 Wimbledon and at four ATP Masters 1000 events.
2021: New doubles partner, reunion with Melo At the end of 2020 season Łukasz Kubot and Marcelo Melo amicably split after a successful partnership that lasted more than four years. At the start of 2021 Kubot partnered with
Wesley Koolhof to reach the third round at the
2021 Australian Open. At
Rotterdam Open third seeds Kubot and Koolhof defeated
Ben McLachlan and
Kei Nishikori before losing to
Jérémy Chardy and
Fabrice Martin in the second round. The pair reached the Masters 1000 quarterfinal at the
2021 Mutua Madrid Open where they were defeated by No. 2 seeds and eventual runners-up Pavić/Mektić. In
Roland Garros, Kubot and Melo decided to return to play together. They lost in the first round to
Nicholas Monroe and
Frances Tiafoe. But at the
2021 Wimbledon Championships they reached the quarterfinals.
2023: United Cup debut Kubot was the part of the Polish team as the doubles player at the inaugural
2023 United Cup. ==Significant finals==