2004–10: early years Bacsinszky's early tennis highlights included reaching the semifinals of three junior Grand Slam tournaments in 2004–05. Her breakthrough professional tournament was the
2006 Zurich Open, where she qualified then defeated
Anastasia Myskina and
Francesca Schiavone before losing to former No. 1,
Maria Sharapova. Her early years on tour were a learning experience, and she finished both 2006 and 2007 ranked in the 120s. Her singles ranking climbed in 2008, and she finished in the top 60 three straight years. Most important was reaching the semifinals of the
Diamond Games in February, winning three qualifying and several main draw matches before losing to world No. 1,
Justine Henin, in three sets. She won her first WTA singles title at the
2009 Luxembourg Open, then won her first three doubles titles the following year.
2011–14: injury and return Bacsinszky suffered a serious foot injury in the spring of 2011, requiring surgery and a long recovery. She returned at the
Fed Cup the following February then used her protected ranking to play several WTA tournaments. She also played a number of
ITF Women's Circuit events. However, she decided to skip the Olympics for personal reasons and soon took a hiatus from tennis altogether. She ended up working in restaurants and bars while preparing to attend hotel management school. Her gradual return to the WTA Tour reached a big milestone at the
2014 Wuhan Open when she upset No. 4, Maria Sharapova, in the third round. A few weeks later, she won her fourth career doubles title.
2015: top-10 debut and first Grand Slam semifinal Bacsinszky began the year in
Shenzhen, upsetting No. 4
Petra Kvitová in the semifinal before losing to No. 3,
Simona Halep, in her first WTA Tour final in five years. She then reached the third round of the
Australian Open followed by back-to-back titles in Mexico at
Acapulco and
Monterrey, beating
Caroline Garcia in both finals. As a result, her ranking rose into the top 30 for the first time. She continued this good form at the Premier Mandatory event in
Indian Wells, defeating No. 8
Ekaterina Makarova en route to the quarterfinals where she lost to No. 1,
Serena Williams, thereby ending her win streak at a career-best 15 matches. At the
French Open she advanced past the third round of a Grand Slam tournament for the first time, once again upsetting Kvitová. She made it all the way to the semifinals and a rematch with No. 1 Williams; Bacsinszky led by a set and a break but lost the last ten games. Then, after making the quarterfinals of
Wimbledon, her ranking rose to 13. The
US Open Series, however, saw unstable results for her, falling in the first round of all four tournaments she entered, including losing to
Barbora Strýcová in her opening match at the
US Open. Entering the
China Open in poor form, Bacsinszky beat Italian
Camila Giorgi, qualifier
Mariana Duque-Marino, and three former top-10 players including
Carla Suárez Navarro,
Sara Errani and
Ana Ivanovic to advance her first ever Premier-Mandatory final where she lost to
Garbiñe Muguruza in straight sets. Her run to the final put her in the top 10 in the
WTA rankings for the first time. She lost out on her run to the
WTA Finals, however, because the last tournament she played (Luxembourg) held its final on Saturday and the points could not count for the race. She withdrew from the
WTA Elite Trophy due to a left knee injury that had already forced her retirement in her first round match in Luxembourg. After the end of the season, Bacsinszky received the WTA's Most Improved Player Award, ending the year No. 12 in the rankings.
2016: fourth singles title and Olympic silver medal in doubles Bacsinszky's first two tournaments both ended in defeats as she lost to
Anastasia Pavlyuchenkova and
Anna Karolína Schmiedlová at the
Brisbane International and at the
Sydney International, respectively. Her next tournament was the
Australian Open, where she beat
Kateřina Siniaková but lost to
Annika Beck. At the Fed Cup, Bacsinszky lost both of her matches in Switzerland's tie against Germany, but these losses did not do any harm to Switzerland who beat Germany in the doubles. She then withdrew from the Dubai Championships. At the
Qatar Ladies Open, Bacsinszky defeated
Bethanie Mattek-Sands and
Yulia Putintseva before losing to eventual champion Carla Suárez Navarro. However, Bacsinszky was not able to defend her back-to-back title in Acapulco and Monterrey from 2015 as they were set in the same dates as the aforementioned tournaments. In March, she reached the fourth round at
Indian Wells beating
Tsvetana Pironkova and
Eugenie Bouchard respectively, but lost to
Daria Kasatkina subsequently. She then made a surprising semifinal run at
Miami Open, beating
Agnieszka Radwańska and Simona Halep, two top-5 players, back-to-back. She lost to
Svetlana Kuznetsova in straight sets in the semifinal. At the clay-court season, Bacsinszky won her fourth WTA title in
Rabat, losing only one set in the tournament, and re-entered the top 10. She made the quarterfinals at
Rome (losing to Garbiñe Muguruza) and reached her highest career ranking at No. 9. At the
French Open, she beat
Sílvia Soler Espinosa, Eugenie Bouchard,
Pauline Parmentier and
Venus Williams en route to her second straight quarterfinal, but lost to the unseeded
Kiki Bertens. Coming to the grass-court season, Bacsinszky played
Eastbourne but was defeated by the in-form
Kristina Mladenovic in straight sets. At
Wimbledon, she started her campaign by beating qualifier
Luksika Kumkhum in the first round and set up a rematch of last year's fourth round match against
Monica Niculescu. Similar to last year, Bacsinszky turned the match around with a comeback win by winning six games in a row in the last set. However, she lost in straight sets to the eventual quarterfinalist Anastasia Pavlyuchenkova. She then reached the semifinals of the inaugural
Ladies Championship Gstaad, losing to Kiki Bertens. At the
Summer Olympics, Bacsinszky suffered a first-round loss to China's
Zhang Shuai; however, partnering with Martina Hingis for the first time in doubles, Bacsinszky earned her first Olympic medal, as they beat Daria Gavrilova/
Samantha Stosur of Australia, Bethanie Mattek-Sands/
CoCo Vandeweghe of the United States,
Chan Hao-ching/
Chan Yung-jan of Taipei and
Andrea Hlaváčková/
Lucie Hradecká of Czech Republic en route to the final, where the pair lost to Ekaterina Makarova/
Elena Vesnina of Russia. They become the first two Swiss female tennis Olympic medalists. Due to her strong first half of the season, Bacsinszky qualified for
Elite Trophy in Zhuhai. At the last event of the season, she lost to Zhang Shuai in straight sets in one of the two round-robin matches, but concluded the season with a win against
Tímea Babos. She ended the season ranked No. 15.
2017: second Grand Slam semifinal Bacsinszky withdrew from the
Shenzhen Open and the
Sydney International due to injury. With no warm-up match before the
Australian Open, she matched her best result at this tournament with a third-round appearance, losing to Daria Gavrilova in three sets. Entering the Fed Cup as the Swiss No. 1, Bacsinszky won both of her rubbers against French player
Alizé Cornet and Kristina Mladenovic. With injuries carried on from the Fed Cup, she had to retire in the first round of Doha and eventually withdrew from Dubai, the first Premier-5 event of the year. The Swiss, however, reached the second week of
Indian Wells for the third consecutive year, only to retire against
Karolína Plíšková due to wrist injury. She also had to withdraw from the Miami Open, where she was a semifinalist from the previous year. In the Fed Cup semifinal against Belarus, Bacsinszky beat
Aryna Sabalenka but lost to
Aliaksandra Sasnovich, and Switzerland eventually lost to Belarus 2–3 in that round. Coming into the clay-court season with few tournaments played from the first quarter of the season, Bacsinszky struggled to go deep in different events including a loss to
CiCi Bellis at
Rabat as the defending champion; a second round loss at
Madrid to
Kiki Bertens, and a loss to Karolína Plíšková in the third round of
Rome. The Swiss however did upset the reigning French Open champion Garbiñe Muguruza in first round of Madrid, her first top-10 win of the season and first win against the Spaniard. At
Roland Garros, Bacsinszky defeated
Sara Sorribes Tormo,
Ons Jabeur,
Madison Brengle, Venus Williams, and Kristina Mladenovic to qualify for the semifinals. She lost in the semifinals against eventual champion
Jeļena Ostapenko. Bacsinszky underwent a surgical procedure in October, thus ending her season prematurely.
2018: return Bacsinszky returned to the tour in January at the
St. Petersburg Ladies' Trophy. She lost in the first round to qualifier
Elena Rybakina. In doubles, she and Vera Zvonareva won the title beating
Alla Kudryavtseva/
Katarina Srebotnik in the final. In March, she played at the
Indian Wells Open. She was defeated in the first round by
Wang Qiang. At the
Miami Open, she lost in the first round to Ekaterina Makarova.
2019 Bacsinszky kicked off her 2019 season at the
Shenzhen Open. She lost in the first round to fifth seed Maria Sharapova. In
Sydney, she reached the quarterfinals before she was defeated by qualifier Aliaksandra Sasnovich. At the
Australian Open, she upset 10th seed Daria Kasatkina in the first round. She lost in the third round to 18th seed Garbiñe Muguruza. At the
St. Petersburg Trophy, Bacsinszky was defeated in the first round by eighth seed and eventual finalist,
Donna Vekić. Competing at the
Indian Wells Challenger, she lost in the third round to
Francesca Di Lorenzo. At the
Indian Wells Open, she was defeated in the final round of qualifying by
Caty McNally. Beginning her clay-court season at the
Ladies Open Lugano, Bacsinszky lost in the second round to Svetlana Kuznetsova. During the
Fed Cup tie versus the US, Bacsinszky was defeated in both of her rubbers by Sloane Stephens and
Sofia Kenin. The US team ended up winning the tie over Switzerland 3–2. At the
Morocco Open, she lost in the second round to fourth seed
Ajla Tomljanović. Seeded fourth at the
Open de Cagnes-sur-Mer, she reached the semifinals where she was defeated by eventual champion
Christina McHale. At the
French Open, she fell in the second round of qualifying to
Kurumi Nara. Seeded seventh at the
Bol Open, she made it to the quarterfinals where she lost to top seed, defending and eventual champion,
Tamara Zidanšek. Playing just one grass-court tournament before Wimbledon, she was defeated in the first round of qualifying at
Eastbourne by compatriot
Viktorija Golubic. At
Wimbledon, she lost in the first round to ninth seed Sloane Stephens. As the top seed at the
Contrexéville Open, Bacsinszky fell in the first round to Kurumi Nara. Playing in her country at the
Ladies Open Lausanne, she lost in the first round to compatriot Jil Teichmann. Competing in New York at the
US Open, Bacsinszky was defeated in the first round by Caty McNally. At the
Korea Open, she suffered a double bagel loss in the first round to American wildcard
Kristie Ahn. Due to not playing any more tournaments for the rest of the season, Bacsinszky ended the year ranked 125.
2021: retirement Bacsinszky did not play any matches throughout the entirety of 2020, and also did not compete in 2021; as such, by July 2021, her ranking had dropped as far as No. 517 in the world. On 16 July 2021, Bacsinszky announced that she had decided to "turn the page", and that she has retired from the sport with immediate effect. ==Sponsors==