| ATP Atlanta | 07/25 01:20 | 25 | [281] Jason Jung v J.J. Wolf [46] | 2-6,1-6 | |
| ATP Atlanta | 07/23 15:00 | 19 | [141] Gabriel Diallo v Jason Jung [277] | 6-4,5-7,6-7 | |
| ATP Atlanta | 07/22 15:45 | 14 | [277] Jason Jung v Shintaro Mochizuki [192] | 7-6,6-4 | |
| Challenger Granby | 07/17 18:10 | 25 | [332] Maxime Janvier v Jason Jung [277] | 7-6,6-3 | |
| Challenger Chicago | 07/14 16:15 | 27 | [252] Yuta Shimizu v Jason Jung [289] | 6-2,7-5 | |
| Challenger Chicago | 07/13 20:05 | 26 | Jason Jung v Nishesh Basavareddy | 3-6,7-6,6-2 | |
| Challenger Chicago | 07/13 15:00 | 25 | [289] Jason Jung v Bernard Tomic [353] | 7-5,6-3 | |
| ITF M25 Jakarta | 06/09 02:25 | 27 | [380] Yanki Erel v Jason Jung [299] | Retired | |
| ITF M25 Jakarta | 06/08 02:00 | 26 | [358] Pruchya Isaro v Jason Jung [299] | 3-6,3-6 | |
| ITF M25 Jakarta | 06/07 02:00 | 25 | Vadym Konovchuk v Jason Jung | 2-6,1-6 | |
| ITF M25 Jakarta | 06/04 02:20 | 29 | [299] Jason Jung v Dominik Palan [318] | 6-2,6-2 | |
| ITF M25 Jakarta | 06/03 03:00 | 28 | [299] Jason Jung v Hiroki Moriya [350] | 6-1,2-6,6-4 | |
| ITF M25 Jakarta | 06/02 02:50 | 27 | Jason Jung v M Rifqi Fitriadi | 6-4,6-0 | |
| ITF M25 Jakarta | 06/01 02:30 | 26 | Jason Jung v Mitsuki Wei Kang Leong | 6-0,6-3 | |
| ITF M25 Jakarta | 05/31 03:25 | 25 | Jason Jung v Aayush P Bhat | 6-1,6-1 | |
| Challenger Busan | 05/10 04:00 | 26 | [319] Jason Jung v Christopher Eubanks [86] | 4-6,3-6 | |
| Challenger Busan | 05/09 03:30 | 25 | [319] Jason Jung v Seong Chan Hong [184] | Retired | |
| Challenger Busan | 05/08 07:05 | 19 | [338] Jason Jung v Ajeet Rai [436] | 7-5,6-1 | |
| Challenger Busan | 05/08 02:00 | 14 | [338] Jason Jung v Shinji Hazawa [259] | 6-2,6-4 | |
| Challenger Gwangju | 05/06 05:40 | 27 | [209] Marc Polmans v Jason Jung [338] | 6-4,6-3 | |
| Challenger Gwangju | 05/05 04:45 | 26 | [363] Yunseong Chung v Jason Jung [338] | 6-3,3-6,4-6 | |
| Challenger Gwangju | 05/02 06:05 | 25 | [338] Jason Jung v Denis Kudla [146] | 6-3,6-7,6-3 | |
| Challenger Gwangju | 05/01 02:55 | 19 | [338] Jason Jung v Hiroki Moriya [359] | 6-3,7-6 | |
| Challenger Gwangju | 04/30 05:20 | 14 | [338] Jason Jung v Makoto Ochi [441] | 6-4,7-6 | |
| Challenger Seoul | 04/23 06:00 | 14 | Duckhee Lee v Jason Jung | 7-6,6-4 | |
| Challenger Leon | 04/12 03:10 | 25 | [340] Jason Jung v Facundo Bagnis [118] | 6-4,3-6,2-6 | |
| Challenger Leon | 04/10 18:00 | 19 | [340] Jason Jung v Marius Copil [384] | 6-1,7-6 | |
| Challenger Leon | 04/09 18:50 | 14 | Jason Jung v Armando Sotelo | 6-2,6-7,6-1 | |
| Challenger San Luis Potosi | 04/04 21:35 | 25 | [340] Jason Jung v Maximilian Neuchrist [206] | 0-6,6-7 | |
| Challenger Pune | 02/26 07:10 | 14 | [338] Jason Jung v Akira Santillan [443] | Retired |
Wikipedia - Jason Jung
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.
History
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.