| Wimbledon | 06/24 12:00 | 19 | [133] Gregoire Barrere v Jason Jung [163] | 7-6,3-6,7-6,6-2 | |
| Wimbledon | 06/23 13:45 | 19 | [225] Tatsuma Ito v Jason Jung [159] | 2-6,1-6 | |
| Wimbledon | 06/22 11:55 | 14 | [159] Jason Jung v Peter Gojowczyk [132] | 6-3,7-6 | |
| ATP - Queens | 06/12 13:45 | 14 | [209] Aleksandar Vukic v Jason Jung [160] | 7-6,7-6 | |
| Challenger - Orlando | 06/07 17:35 | 25 | [324] Nicolas Jarry v Jason Jung [160] | 6-4,7-5 | |
| Challenger - Little Rock | 06/04 19:40 | 27 | [160] Jason Jung v Mitchell Krueger [207] | 6-3,2-6,1-6 | |
| Challenger - Little Rock | 06/02 22:15 | 26 | [160] Jason Jung v Hiroki Moriya [260] | 6-3,6-4 | |
| Challenger - Little Rock | 05/31 23:00 | 25 | [160] Jason Jung v Christian Harrison [301] | 6-1,6-2 | |
| Open de França | 05/24 19:00 | 14 | [160] Jason Jung v Liam Broady [146] | 4-6,2-6 | |
| Challenger - Oeiras | 05/17 12:20 | 25 | [161] Jason Jung v Frederico Ferreira Silva [169] | 6-1,4-6,3-6 | |
| Challenger - Zagreb | 05/10 13:55 | 25 | [151] Jason Jung v Andrej Martin [116] | Retired | |
| Challenger - Tallahassee | 04/22 19:30 | 26 | [227] Thai-Son Kwiatkowski v Jason Jung [150] | 6-3,6-2 | |
| Challenger - Tallahassee | 04/20 15:05 | 25 | [249] Jack Sock v Jason Jung [150] | 6-2,3-6,4-6 | |
| Challenger - Orlando | 04/12 17:10 | 25 | [151] Jason Jung v Jenson Brooksby [232] | 1-6,4-6 | |
| ATP - Miami | 03/23 17:45 | 19 | [149] Jason Jung v Paolo Lorenzi [157] | 4-6,4-6 | |
| ATP - Miami | 03/22 18:05 | 14 | [149] Jason Jung v Nicolas Mahut [238] | 6-4,3-6,6-1 | |
| ATP - Acapulco | 03/14 01:10 | 14 | Jason Jung v Frederico Ferre Silva | 5-7,2-6 | |
| ATP - Singapura | 02/22 06:00 | 25 | [143] Jason Jung v Maxime Cressy [156] | 6-7,2-6 | |
| Challenger - Biella | 02/15 12:45 | 25 | [97] Soonwoo Kwon v Jason Jung [136] | 6-3,6-4 | |
| ATP - Paris | 10/31 17:25 | 14 | [77] Marco Cecchinato v Jason Jung [127] | 6-3,6-4 | |
| ATP - Viena | 10/28 13:00 | 25 | [127] Jason Jung v Daniil Medvedev [6] | 3-6,1-6 | |
| ATP - Viena | 10/25 14:30 | 19 | [128] Jason Jung v Vasek Pospisil [80] | 6-7,6-3,3-6 | |
| ATP - Viena | 10/24 15:00 | 14 | [47] Kyle Edmund v Jason Jung [128] | 7-6,4-6,2-6 | |
| Challenger - Istambul | 10/23 11:55 | 27 | [128] Jason Jung v Benjamin Bonzi [191] | 6-7,2-6 | |
| Challenger - Istambul | 10/21 07:30 | 26 | [128] Jason Jung v Tristan Lamasine [272] | 6-0,6-3 | |
| Challenger - Istambul | 10/19 07:00 | 25 | [127] Jason Jung v Denis Istomin [176] | Retired | |
| ATP - Colónia | 10/10 12:00 | 64 | [93] Emil Ruusuvuori v Jason Jung [125] | 7-6,6-3 | |
| Challenger - Parma | 10/05 09:00 | 25 | [125] Jason Jung v Laslo Djere [73] | 2-6,4-6 | |
| Open de França | 09/27 10:45 | 23 | [98] Federico Coria v Jason Jung [125] | 7-5,7-6,7-6 | |
| Open de França | 09/24 12:05 | 19 | [125] Jason Jung v Aleksandar Vukic [192] | 3-6,6-3,3-6 |
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.