| 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 Jacarta | 06/09 02:25 | 27 | [380] Yanki Erel v Jason Jung [299] | Retired | |
| ITF - M25 Jacarta | 06/08 02:00 | 26 | [358] Pruchya Isaro v Jason Jung [299] | 3-6,3-6 | |
| ITF - M25 Jacarta | 06/07 02:00 | 25 | Vadym Konovchuk v Jason Jung | 2-6,1-6 | |
| ITF - M25 Jacarta | 06/04 02:20 | 29 | [299] Jason Jung v Dominik Palan [318] | 6-2,6-2 | |
| ITF - M25 Jacarta | 06/03 03:00 | 28 | [299] Jason Jung v Hiroki Moriya [350] | 6-1,2-6,6-4 | |
| ITF - M25 Jacarta | 06/02 02:50 | 27 | Jason Jung v M Rifqi Fitriadi | 6-4,6-0 | |
| ITF - M25 Jacarta | 06/01 02:30 | 26 | Jason Jung v Mitsuki Wei Kang Leong | 6-0,6-3 | |
| ITF - M25 Jacarta | 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 - Seul | 04/23 06:00 | 14 | Duckhee Lee v Jason Jung | 7-6,6-4 | |
| Challenger - León | 04/12 03:10 | 25 | [340] Jason Jung v Facundo Bagnis [118] | 6-4,3-6,2-6 | |
| Challenger - León | 04/10 18:00 | 19 | [340] Jason Jung v Marius Copil [384] | 6-1,7-6 | |
| Challenger - León | 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.