2014: ATP qualifying debut, Futures events Moutet began his professional career when he was given a wildcard into the qualifying event at the
Moselle Open, where he won his first round match against
Ukrainian Gleb Alekseenko in two sets. He then faced second-seeded
Pierre-Hugues Herbert, who defeated him in straight sets. Moutet then played three consecutive Futures. Qualifying for each event, he reached the second round at both Dominican Republic F1 and F3 and the quarterfinals at Dominican Republic F2.
2015: First Futures final, French Open qualifying The 2015 season started in Spain for Moutet. Competing in the Spain F5, he won two qualifying matches before advancing to the quarterfinals, defeating the second seed,
Oriol Roca Batalla, in the first round. At his next event, Italy F3, only the fourth Futures event of his career, Moutet reached his first final. En route, he toppled three seeded players: fifth-seeded
Nicolas Reissig, second-seeded Omar Giacalone, and fourth-seeded Riccardo Sinicropi. Waiting for Moutet in the final was top-seeded
Gianluca Naso. Moutet raced to a quick lead, winning the first set 6–0, but Naso found his footing and rebounded to take the next two sets and the title. Moutet saw action in two more Futures events in April. In May, Moutet was granted a wildcard into his first
Challenger event at
Bordeaux, where he lost to fourth-seeded
Robin Haase in the first round. He was then granted a wildcard into the qualifying draw of the
French Open, where he lost
Michael Berrer of Germany in the first round. Following the French Open, Moutet played four additional Futures events to finish the year, winning only two main draw matches. Moutet saw action in three Futures events in March. At France F5, Moutet defeated three seeded players en route to the second final of his career, where he lost to
Raymond Sarmiento of the
United States in straight sets. Two weeks later, he attempted to qualify for the
Saint-Brieuc Challenger, but fell in the second round to
Edward Corrie. From April to July, Moutet participated in seven Futures events in France, Croatia, and Italy, advancing to two quarterfinals. Two weeks later, Moutet was granted a wildcard into both the
singles and
doubles at the
Brest Challenger. In singles, he advanced to the second round, where he lost to second seed
Lukáš Lacko in straight sets. In doubles, partnering
Grégoire Jacq, he advanced to the quarterfinals. The next week, Moutet competed at the Norway F2 event, advancing to the quarterfinals. November brought the end of the season for Moutet. He competed at the
Mouilleron-le-Captif Challenger as a wildcard, where he lost in the first round to
Alex de Minaur. His final event was Egypt F33. Seeded sixth, he lost in three sets to
Piotr Matuszewski. Moutet finished the year ranked No. 529. He nexted competed at France F6, losing in the first round in both singles and doubles. Granted a wildcard, Moutet next competed at the
Saint-Brieuc Challenger. After defeating third seed
Norbert Gombos in the first round and fellow wildcard
Rémi Boutillier in the second, Moutet faced
James McGee in the quarterfinals. McGee took the first set easily, but Moutet fought back and eventually won the match 2–6, 7–6(9–7), 7–6(7–5) to reach his first Challenger semifinal. Moutet's run ended in the semifinals, when he lost to eventual champion
Egor Gerasimov, 6–4, 4–6, 3–6. Moutet's next tournament was the
Sophia Antipolis Challenger, where he lost in the first round to third seed
Guillermo García López. He then competed at the Tunisia F5 Futures, where he lost in the second round. May brought renewed success for Moutet. Competing at France F10, he moved swiftly through the draw to take his first title of the season, dropping just one set along the way. Moutet next played at the
Como Challenger. After coming through qualifying, he defeated sixth-seeded García López en route to his second Challenger semifinal of the season. He then competed in the
Seville Challenger, where he again made the semifinals before losing to
Íñigo Cervantes, 2–6, 2–6. Moutet then went on a two-tournament win streak, taking home both the Spain F30 and Italy F32 titles without dropping a set. He continued his success at his next event, Italy F33, where he made a run to the final. Moutet found the biggest success of the season at the
Brest Challenger. Entered as a wildcard, Moutet again defeated Gombos in the first round, winning 4–6, 6–4, 6–1. He then defeated
Tristan Lamasine in the second round, 6–4, 6–7(6–8), 6–3. In the quarterfinal, Moutet faced
Gleb Sakharov, winning the match in straight sets. Advancing to another semifinal, he defeated
Yannick Maden, 4–6, 7–6(7–2), 6–4, to advance to the first Challenger final of his career. Awaiting Moutet in the final was
Stefanos Tsitsipas, whom he had not yet faced at the professional level. Eager to take his first Challenger title, Moutet won the match, 6–2, 7–6(10–8). The next week, Moutet competed at the
Eckental Challenger. After defeating sixth seed Lukáš Lacko in the first round and
Yann Marti in the second, Moutet's run came to an end in the quarterfinals, where he lost to eventual champion
Maximilian Marterer. His final event of the year was the
Mouilleron-le-Captif Challenger, where he lost to seventh seed
Alexander Bublik in the first round. Moutet finished the year ranked No. 155. The following week, he competed at the
Canberra Challenger. Unseeded and unable to replicate the success of the previous week, Moutet lost in straight sets in the first round to another unseeded player,
Nicolás Jarry of
Chile. On 15 January, Moutet made his debut in the singles main draw of an ATP World Tour tournament and a Grand Slam tournament at the
Australian Open. As a wildcard entry, he faced
Italian veteran
Andreas Seppi in the first round of that tournament. Despite winning the first set, Moutet was unable to prevail, falling 6–3, 4–6, 2–6, 2–6. In early February, Moutet received a wildcard for the singles main draw at the
Ecuador Open. He won the first ATP World Tour singles main draw match of his career at that tournament when he defeated
Adrián Menéndez Maceiras in the first round. He upset 7th-seeded
Ivo Karlović in the second round before losing to the Slovak qualifier
Andrej Martin 3–6, 4–6 in the quarterfinals. Moutet received a wildcard for the singles main draw of the
French Open. He won the first Grand Slam singles main draw match of his career when he again defeated Ivo Karlović in straight sets. Moutet was the youngest competitor and one of six teenagers in the men's singles main draw of the 2018 French Open. 39 year-old Karlović, by contrast, was the oldest. Moutet lost his second round match to the eight seed
David Goffin in straight sets.
2019: French third and Wimbledon second round, top 100 At the
French Open, Moutet (who entered the singles main draw as a wildcard) upset 19th-seed
Guido Pella in the second round before losing to the unseeded
Juan Ignacio Londero in five sets in the third round. He won his fourth title at the
2019 Open Sopra Steria de Lyon and reached the top 100 on 17 June 2019. As a qualifier, Moutet upset
Grigor Dimitrov in the first round before losing to the 19th seed
Félix Auger-Aliassime in the second round at
Wimbledon.
2020: ATP singles final, US Open third round Moutet reached his first career ATP Tour singles final (where he lost to
Andrey Rublev in straight sets) as a qualifier at the
2020 Qatar ExxonMobil Open, after defeating fourth-seeded
Milos Raonic in the second round and top-seeded
Stan Wawrinka in the semifinals. Moutet then followed with a good result in his first clay-court tournament of the year in
Córdoba, where he lost in the quarterfinals to
Andrej Martin. He enjoyed his joint-best showing in a Grand Slam tournament at the
2020 US Open by defeating 23rd seed
Dan Evans in the second round before losing to 15th seed
Félix Auger-Aliassime in the third round. At the
2020 French Open Moutet lost to first time main draw qualifier at this Major, Italian
Lorenzo Giustino 6–0, 6–7 (7), 6–7 (3), 6–2, 16–18 in the first round. The match was the second-longest in French Open history, lasting 6 hours, 5 minutes. It was Guistino's first tour-level win.
2021: Career-high ranking in top 70 In February, Moutet reached the semifinals at the
2021 Murray River Open lead-up tournament to the Australian Open in Melbourne defeating the No. 2 seeded
Grigor Dimitrov in the quarterfinals before losing to Canadian No. 3 seeded
Félix Auger-Aliassime in the semifinals. The following week, he finally won his first round match at the Australian Open for the first time at the
2021 edition, defeating Australian player
John Millman in five sets. He did not progress further at that tournament, losing his second round match to Canadian no. 14 seed
Milos Raonic in four sets. At the
2021 Estoril Open in April, Moutet defeated another Canadian, the top seeded wildcard
Denis Shapovalov, in the second round, before losing to
Albert Ramos Viñolas in the quarterfinals. Moutet reached a career-high ATP singles ranking of No. 67 on 3 May 2021. Moutet was the highest ranked player still without a top 10 win, (replaced by South Korea's
Kwon Soon-woo on 14 June), the highest-ranked player whom he had defeated in his career being the then world No. 13
David Goffin at the
2021 Halle Open.
2022: US Open fourth round, FFT expulsion, top 60 debut At the
Adelaide International 1 tournament on 5 January 2022, Moutet was disqualified for swearing at the chair umpire immediately after he had lost the second set of his second-round match against
Laslo Đere. As of result of Moutet's disqualification, Đere was awarded a walkover 4–6, 7–5 win and a passage into the quarterfinals. Moutet enjoyed a fine run in his next tournament (the
Adelaide International 2), winning two qualifying and three main draw matches to reach the semifinals, where he was defeated by his unseeded countryman
Arthur Rinderknech 1–6, 3–6. At the
2022 Australian Open Moutet defeated wildcard and compatriot
Lucas Pouille in the first round before losing to
Sebastian Korda in the second round in a five-set match that ended in a super tiebreak in the fifth set. In May, Moutet was awarded a wildcard into the singles main draw of the
2022 French Open, where he defeated
Stanislas Wawrinka in the first round before losing to
Rafael Nadal in the second round. Ranked world No. 112 at the
US Open, Moutet entered the
singles main draw as a
lucky loser. In the first round, he defeated
Stanislas Wawrinka (who retired after losing the first two sets) to register a 3-0 head-to-head record against the
2016 US Open champion. Next he defeated 21st seed
Botic van de Zandschulp to move onto the singles third round for the second time (the first was in
2020) at this Major. He went one step further defeating
Pedro Cachin to move into a Grand Slam fourth round for the first time in his career and making history by becoming the first male lucky loser to reach the fourth round at this Grand Slam and the first to do so at any Grand Slam since
Stéphane Robert at the
2014 Australian Open. He lost his fourth round match to
Casper Ruud in four sets. As a result of his good performance at the US Open, he moved close to 30 places up the
ATP singles rankings to world No. 84 on 12 September 2022. In September, he won the ATP Challenger Tour
Szczecin Open singles title, defeating
Dennis Novak in the final. He reached a career-high
ATP singles rankings of world No. 64 on 19 September 2022. On October 4, Moutet was fined 10,000 euros by the
ATP following his scuffle on the court with
Adrian Andreev immediately after Moutet lost his second-round match against Andreev at the
Open d'Orléans. The umpire had to intervene to separate the players. On November 1, right after his first round match win against
Borna Ćorić at the
2022 Rolex Paris Masters, he was expelled from the Federation of French Tennis (FFT) due to repeated bad behavior. He won his second round match defeating world No. 13 and 12th seed
Cameron Norrie a match that finished at 3:03 AM, the latest ever match finish in Paris Bercy. He lost to
Stefanos Tsitsipas in straight sets. As a result, he moved to a new career-high ranking of world No. 51 on 7 November 2022.
2023: Out of Top 100 As a result of break due to a wrist surgery in January 2023, and multiple first round losses, including at the
2023 US Open, Moutet dropped out of the Top 100 in September 2023. In November, he won his first
Challenger title in more than a year at the
2023 HPP Open in Helsinki, defeating
Sumit Nagal in the final.
2024: Major and Masters fourth round, Olympics debut Moutet reached the semifinals at the
2024 Chile Open in Santiago as a qualifier with an upset over top seed and defending champion
Nicolás Jarry, before losing to fourth seed
Alejandro Tabilo. Moutet reached the fourth round at the
2024 French Open for the first time in his career defeating 16th seed Nicolás Jarry,
Alexander Shevchenko and
Sebastian Ofner all in four sets. Moutet lost to second seed
Jannik Sinner. In July 2024, at the
Paris Olympics, Moutet defeated
Sumit Nagal in the first round and then received a walkover against
Jan-Lennard Struff. At the
2025 Queen's Club Championships, Moutet defeated third seed
Taylor Fritz in the first round, his second top 10 win. The following week, at the
Mallorca Open, Moutet reached his second career final on the
ATP Tour, more than five years after his first final. He defeated third seed
Alex Michelsen in the semifinal but lost to
Tallon Griekspoor in the final. In July, at the
Washington Open, he entered the main draw as a lucky loser directly in the second round. In the third round he defeated former champion
Dan Evans. He defeated
Daniil Medvedev in the quarterfinals to reach his first
ATP 500 career semifinal. As a result he reached the top 50 for the first time at a new career high singles ranking of world No. 46 on 28 July 2025. In the semifinals, he lost to
Alex de Minaur in straight sets. ==Playing style==