| Challenger Seoul | 10/09 09:20 | 14 | [453] Jason Jung v Mukund Sasikumar [371] | 4-6,3-6 | |
| Challenger Gwangju | 10/06 02:00 | 26 | [161] Maximilian Marterer v Jason Jung [453] | 3-6,7-5,7-5 | |
| Challenger Gwangju | 10/04 06:15 | 25 | [360] Nicolas Barrientos v Jason Jung [453] | 1-6,6-4,6-7 | |
| Challenger Gwangju | 10/03 03:50 | 19 | [453] Jason Jung v Naoki Tajima [458] | 6-0,6-3 | |
| Davis Cup | 09/18 07:20 | 5 | Jason Jung v Hong Kit Wong | Cancelled | |
| Davis Cup | 09/17 03:00 | 1 | Jason Jung v Coleman Wong | 6-1,4-6,6-7 | |
| Challenger Nonthaburi | 08/30 05:05 | 25 | Jason Jung v Sho Shimabukuro | Cancelled | |
| Challenger Nonthaburi | 08/22 11:25 | 25 | [433] Jason Jung v Illya Marchenko [308] | 6-7,2-6 | |
| ATP Newport | 07/10 18:50 | 14 | [265] Jason Jung v Mirza Basic [249] | 3-6,4-6 | |
| Challenger Porto | 07/04 14:45 | 25 | [217] Antoine Bellier v Jason Jung [265] | 6-3,2-6,6-4 | |
| Challenger Malaga | 06/29 11:50 | 26 | [149] Constant Lestienne v Jason Jung [265] | 6-1,6-3 | |
| Challenger Malaga | 06/28 08:30 | 25 | [430] Daniel Cukierman v Jason Jung [265] | 2-6,5-7 | |
| Wimbledon | 06/23 10:00 | 19 | [104] Marc-Andrea Huesler v Jason Jung [263] | 7-5,6-4,3-6,3-6,6-2 | |
| Wimbledon | 06/22 12:35 | 19 | [263] Jason Jung v Illya Marchenko [275] | 7-6,6-2 | |
| Wimbledon | 06/20 11:35 | 14 | [263] Jason Jung v Filip Misolic [210] | 6-2,3-6,6-2 | |
| Challenger Ilkley | 06/13 10:00 | 19 | [431] Charles Broom v Jason Jung [262] | 7-6,6-4 | |
| Challenger Ilkley | 06/12 13:30 | 14 | [249] Jason Jung v Matheus P De Almeida [221] | 6-4,1-6,7-5 | |
| Challenger Nottingham | 06/07 14:20 | 25 | [192] Borna Gojo v Jason Jung [249] | 6-2,7-6 | |
| Challenger Nottingham | 06/06 13:20 | 19 | Jason Jung v Giles Hussey | 6-3,7-6 | |
| Challenger Nottingham | 06/05 18:00 | 14 | [255] Jason Jung v Henry Patten [320] | 7-5,6-4 | |
| Challenger Surbiton | 05/30 10:00 | 19 | [170] Max Purcell v Jason Jung [256] | 4-6,6-4,6-4 | |
| Challenger Surbiton | 05/29 10:00 | 14 | [58] Aleksandr Nedovyesov v Jason Jung [256] | 1-6,3-6 | |
| French Open | 05/18 11:55 | 15 | [110] Chun Hsin Tseng v Jason Jung [250] | 7-5,6-4 | |
| French Open | 05/17 09:30 | 14 | [250] Jason Jung v Zizou Bergs [198] | 6-4,7-6 | |
| Challenger Bordeaux | 05/08 15:15 | 14 | Jason Jung v Calvin Hemery | 6-3,3-6,4-6 | |
| Challenger Savannah | 04/27 16:00 | 26 | [226] Jason Jung v Alex Rybakov [373] | 5-7,4-6 | |
| Challenger Savannah | 04/25 17:25 | 25 | [138] Emilio Gomez v Jason Jung [226] | Retired | |
| Challenger Tallahassee | 04/19 23:40 | 25 | [95] Tomas Martin Etcheverry v Jason Jung [217] | 6-3,6-2 | |
| Challenger Sarasota | 04/11 20:25 | 25 | [272] Yosuke Watanuki v Jason Jung [218] | 6-2,6-2 | |
| Challenger Phoenix | 03/14 22:20 | 14 | [128] Mats Moraing v Jason Jung [223] | 6-2,3-6,7-5 |
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.