| 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 | |
| French Open | 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 Singapore | 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 Vienna | 10/28 13:00 | 25 | [127] Jason Jung v Daniil Medvedev [6] | 3-6,1-6 | |
| ATP Vienna | 10/25 14:30 | 19 | [128] Jason Jung v Vasek Pospisil [80] | 6-7,6-3,3-6 | |
| ATP Vienna | 10/24 15:00 | 14 | [47] Kyle Edmund v Jason Jung [128] | 7-6,4-6,2-6 | |
| Challenger Istanbul | 10/23 11:55 | 27 | [128] Jason Jung v Benjamin Bonzi [191] | 6-7,2-6 | |
| Challenger Istanbul | 10/21 07:30 | 26 | [128] Jason Jung v Tristan Lamasine [272] | 6-0,6-3 | |
| Challenger Istanbul | 10/19 07:00 | 25 | [127] Jason Jung v Denis Istomin [176] | Retired | |
| ATP Cologne | 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 | |
| French Open | 09/27 10:45 | 23 | [98] Federico Coria v Jason Jung [125] | 7-5,7-6,7-6 | |
| French Open | 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.