Challenger - Nonthaburi | 01/20 03:30 | 28 | [171] Matteo Gigante v Jason Jung [260] | 6-3,7-5 | |
Challenger - Nonthaburi | 01/19 05:10 | 27 | [195] Ryan Peniston v Jason Jung [260] | 4-6,3-6 | |
Challenger - Nonthaburi | 01/17 03:30 | 26 | [260] Jason Jung v Aziz Dougaz [230] | 6-4,7-6 | |
Challenger - Nonthaburi | 01/15 08:35 | 25 | [497] Maximus Jones v Jason Jung [260] | 2-6,1-6 | |
Challenger - Nonthaburi | 01/10 05:00 | 26 | [323] Manuel Guinard v Jason Jung [242] | 6-1,7-6 | |
Challenger - Nonthaburi | 01/09 06:15 | 25 | [371] Nick Hardt v Jason Jung [242] | 4-6,2-6 | |
Challenger - Yokohama | 11/20 07:45 | 25 | [242] Jason Jung v Yuta Shimizu [249] | 4-6,5-7 | |
Challenger - Kobe | 11/17 03:15 | 27 | [230] Tung-Lin Wu v Jason Jung [242] | 6-4,6-3 | |
Challenger - Kobe | 11/16 02:00 | 26 | [362] Yunseong Chung v Jason Jung [242] | Retired | |
Challenger - Kobe | 11/14 03:15 | 25 | [242] Jason Jung v Zdenek Kolar [179] | 6-4,7-6 | |
Challenger - Matsuyama | 11/07 01:00 | 25 | [230] Jason Jung v Yuta Shimizu [252] | 4-6,6-2,4-6 | |
ATP - Tokyo | 10/14 06:35 | 14 | [97] Taro Daniel v Jason Jung [235] | 6-7,6-3,6-3 | |
Challenger - Shenzhen | 10/13 04:40 | 27 | [235] Jason Jung v Pedro Cachin [71] | 3-6,4-6 | |
Challenger - Shenzhen | 10/12 03:40 | 26 | [139] James Duckworth v Jason Jung [235] | 6-3,5-7,2-6 | |
Challenger - Shenzhen | 10/10 07:00 | 25 | [235] Jason Jung v Evgeny Donskoy [233] | 6-4,2-6,6-4 | |
ATP - Shanghai | 10/02 11:00 | 14 | [302] Beibit Zhukayev v Jason Jung [232] | 4-6,6-3,6-3 | |
Challenger Zhangjiagang | 08/29 08:00 | 25 | Jie Cui v Jason Jung | Cancelled | |
Challenger - Zhuhai | 08/26 08:10 | 29 | [386] Arthur Weber v Jason Jung [256] | 6-3,5-7,6-3 | |
Challenger - Zhuhai | 08/25 04:30 | 28 | Zhe Li v Jason Jung | 6-7,1-6 | |
Challenger - Zhuhai | 08/24 03:00 | 27 | [403] Robert Strombachs v Jason Jung [256] | 4-6,2-6 | |
Challenger - Zhuhai | 08/23 06:30 | 26 | [446] Fajing Sun v Jason Jung [256] | 3-6,6-3,6-7 | |
Challenger - Zhuhai | 08/22 08:50 | 25 | Yan Bai v Jason Jung | 2-6,3-6 | |
Challenger - Stanford | 08/14 19:15 | 25 | [167] Dalibor Svrcina v Jason Jung [258] | 6-4,6-2 | |
Challenger - Stanford | 08/13 18:45 | 19 | Jason Jung v Keegan Smith | 5-7,6-4,6-1 | |
Challenger - Stanford | 08/12 20:05 | 14 | Jason Jung v Abraham Asaba | 6-1,6-2 | |
Challenger - Stanford | 08/12 19:40 | 14 | Jason Jung v Donald Young | Cancelled | |
ATP - Los Cabos | 08/03 02:20 | 26 | [16] Borna Coric v Jason Jung [276] | 6-1,6-2 | |
ATP - Los Cabos | 08/02 01:00 | 25 | [276] Jason Jung v Ernesto Escobedo [377] | 3-6,7-6,6-2 | |
ATP - Los Cabos | 07/31 02:50 | 19 | [398] Omni Kumar v Jason Jung [281] | 6-4,4-6,7-6 | |
ATP - Los Cabos | 07/30 04:00 | 14 | [452] Alexandr Cozbinov v Jason Jung [281] | 0-6,1-6 |
Jason Jung (Chinese: 莊吉生; pinyin: Zhuāng Jíshēng; Pe̍h-ōe-jī: Chng Kit-seng; Taiwanese Mandarin: [tswáŋ tɕǐ sə́ŋ]; born 15 June 1989) is an American-born Taiwanese professional tennis player who represents the team Chinese Taipei. He has a career high ATP singles ranking of world No. 114 achieved on 30 July 2018 and has won four ATP Challenger titles. Jung has attended the University of Michigan.
Jung's reached his first quarterfinal at the 2018 Hall of Fame Tennis Championships in Newport, Rhode Island. He defeated veteran Nicolas Mahut in the second round, but his run was ended by Tim Smyczek, who outlasted Jung 6–1, 5–7, 6–4 in a nearly two-hour, 185-point quarterfinal match.
His career-best result is a semifinal berth at the 2020 New York Open, where he defeated former world number 5 Kevin Anderson in the first round, followed by 7th seed Cameron Norrie in the second before upsetting defending champion and 3rd seed Reilly Opelka in the quarterfinals. He was eliminated in the semifinals by Italian veteran Andreas Seppi in straight sets.