- Brief details
- OverviewSinglesYTDCareerDoublesYTDCareerATP singles titles4-67-25ATP doubles titles0-01-3Prize money$558,728$1,357,239Prize money$5,294$1,357,239Titles00Titles00
- GamesAlmaty (Almaty, Kazakhstan)Dates:13/10/2025 – 19/10/2025Category:ATP FinalsSurface:HardPrize fund:$1,141,405Rank:102RoundResultOpponentRankPtsRound of 83636 63 26Round of 162663 63Round of 325864 64Pts:50Jinan (Jinan, China)Dates:06/10/2025 – 12/10/2025Category:ATP FinalsSurface:HardPrize fund:$200,000Rank:102RoundResultOpponentRankPtsRound of 470--Round of 8168--Round of 16182--Round of 32192--Pts:35ATP. Shanghai (Shanghai, China)Dates:29/09/2025 – 12/10/2025Category:ATP FinalsSurface:HardPrize fund:$10,899,875Rank:102RoundResultOpponentRankPtsQualification. Round 1150--Pts:0Tokyo (Tokyo, Japan)Dates:22/09/2025 – 30/09/2025Category:ATP FinalsSurface:HardPrize fund:$2,404,500Rank:106RoundResultOpponentRankPtsRound of 321264 16 16Pts:0Davis Cup. Japan vs Germany. Qualification. Round 2 (Tokyo, Japan)Dates:08/09/2025 – 13/09/2025Category:ATP FinalsSurface:HardPrize fund:$0Rank:104RoundResultOpponentRankPtsRound Robin13536 36Pts:0US Open (New York, USA)Dates:25/08/2025 – 07/09/2025Category:ATP FinalsSurface:HardPrize fund:$40,412,800Rank:112RoundResultOpponentRankPtsRound of 64826 46 26Round of 12812564 63 64Q3131--Qualification. Round 2142--Qualification. Round 1154--Pts:80ATP. Cincinnati (Cincinnati, USA)Dates:04/08/2025 – 18/08/2025Category:ATP FinalsSurface:HardPrize fund:$10,699,455Rank:120RoundResultOpponentRankPtsQualification. Round 2177--Qualification. Round 1454--Pts:10Sumter (Sumter, USA)Dates:11/08/2025 – 17/08/2025Category:ATP FinalsSurface:HardPrize fund:$200,000Rank:120RoundResultOpponentRankPtsRound of 4102--Round of 896--Round of 16630--Round of 32311--Pts:35ATP. Toronto (Toronto, Canada)Dates:28/07/2025 – 07/08/2025Category:ATP FinalsSurface:HardPrize fund:$10,658,890Rank:122RoundResultOpponentRankPtsRound of 1284346 26Qualification. Round 1224--Pts:30Bloomfield Hills (Bloomfield Hills, USA)Dates:21/07/2025 – 27/07/2025Category:ATP FinalsSurface:HardPrize fund:$160,000Rank:123RoundResultOpponentRankPtsRound of 32213--Pts:0
- Full descriptionPersonal
Father was a tennis coach Began holding a tennis racquet at age of 1 Considered quitting tennis at age of 9 and pursuing baseball instead Favourite baseball team is New York Yankees Stuck to tennis and began training as 12-year-old at IMG Academy in Bradenton, FL, USA Enjoys hanging out with friends, watching YouTube videos and listening to Japanese music Likes singing for fun when he's alone and at the karaoke Tennis idol is Roger Federer, who won his 1st Grand Slam title 34 days after Mochizuki was born Also admires Novak Djokovic Goal is to become World No. 1 in PIF ATP Rankings
CareerFormer World No. 1 junior achieved career-high No. 112 in August 2025 soon after recording 1st Grand Slam win to reach Wimbledon 2R (d. Zeppieri)
At 2023 Tokyo, earned 1st ATP Tour win over Etcheverry in 1R after 0-11 start on tour-level and recorded biggest win of career over No. 10 Fritz en route to his 1st ATP Tour SF
Made his ATP Tour debut at 2021 Singapore as WC and Grand Slam debut at 2023 Wimbledon as Q
Also entered Grand Slam main draws at 2024 Australian Open as LL, 2024 Roland Garros as Q, 2025 Wimbledon as Q and 2025 US Open as Q
Owns 71-69 Challenger record (2-2 in finals), winning titles at 2023 Barletta and 2025 Noumea
Ended his junior career with a 119-45 record on ITF Junior Circuit, highlighted by 2019 Wimbledon boys’ singles title, becoming the 1st Japanese player to win a Grand Slam boys’ singles title
- Recent matches


































