Tseng Chun-hsin (Chinese: 曾俊欣; pinyin: Zēng Jùnxīn; born 8 August 2001), also known as Jason Tseng,[1] is a Taiwanese tennis player.
He has a career-high singles ranking of world No. 83 by the ATP, achieved on 8 August 2022. Tseng is currently the No. 1 Taiwanese player.[2]
Tseng began playing tennis at the age of five with his father, who worked at a night market in Taiwan.[3][4] He first trained in elementary school team located in Yonghe District, New Taipei City.[5]
He is nicknamed "the Night Market Champion" (Chinese: 夜市球王) by the Taiwanese media as his parents used to sell Tanghulu at the Lehua Night Market in New Taipei City in order to support his tennis career.[3][6][7]
In 2018, He won his first ITF Futures event in Vietnam.[10] He won the boys' singles title at the French Open and claimed the Wimbledon boys' singles title in the following month.[11]
2021–2022: Challenger breakthrough, Grand Slam & top 100 debuts
In December 2021, Tseng won his first ATP Challenger title in Maia, Portugal.[13][14] He made his debut in the top 200 at world No. 188 on 20 December 2021.
The following month in February 2022, Tseng won his second ATP Challenger title in Bangalore, India.[17] In April 2022, Tseng won his third ATP Challenger title in Murcia, Spain.[18] He reached a career-high ranking of world No. 110 on 16 May 2022.
He qualified for his second Grand Slam tournament at the 2022 French Open to make his debut at this major.[19] He lost in the first round in five sets in a match that lasted 4 hours 23 minutes against João Sousa.[20]
As a result of reaching the semifinals in Bratislava, Tseng made his debut in the top 100, at No. 97 on 13 June 2022.
2023–2024: First Masters win and ATP quarterfinal, back to top 115
Ranked No. 380, he made his debut in qualifying at the Masters 1000, the 2023 Rolex Shanghai Masters. He qualified for the main draw and defeated Alexander Shevchenko on his debut at this tournament, recording his first Masters win. As a result, he moved close to 80 positions back up, one position shy of the top 300 on 16 October 2023.
In March 2024, he won his fourth Challenger at the Kiskút Open in Szekesfehevar, Hungary and returned to the top 250 on 18 March 2024.[22]
Ranked No. 159, he entered the second round of the main draw at the Croatia Open as a lucky loser replacing third seed Holger Rune and defeated Fabio Fognini to reach his first ATP Tour quarterfinal.[23][24] As a result, he returned to the top 150 in the rankings on 29 July 2024 and to the top 115, three weeks later following a final showing at the 2024 San Marino Open.
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