| Challenger Zhangjiagang | 09/08 05:25 | 28 |
[115] Jason Jung v
Alexander Bublik
[203] 
|
7-6,6-7,6-0 | |
| Challenger Zhangjiagang | 09/07 02:30 | 27 | [115] Jason Jung v Akira Santillan [283] | 7-5,6-2 | |
| Challenger Zhangjiagang | 09/06 04:40 | 26 |
[115] Jason Jung v
Zhizhen Zhang
[342] 
|
6-4,6-4 | |
| Challenger Zhangjiagang | 09/05 02:00 | 25 |
[115] Jason Jung v
Yuta Shimizu
[417] 
|
6-4,6-3 | |
| ATP Washington Qual | 07/29 16:25 | 64 | [121] Jason Jung v Donald Young [230] | Retired | |
| ATP Atlanta Qual | 07/22 17:00 | 164 | [131] Jason Jung v Noah Rubin [166] | 4-6,2-6 | |
| ATP Atlanta Qual | 07/21 17:45 | 64 |
[131] Jason Jung v
Christopher Eubanks
[201] 
|
6-4,6-3 | |
| ATP Newport | 07/19 16:30 | 27 | [131] Jason Jung v Tim Smyczek [123] | 1-6,7-5,4-6 | |
| ATP Newport | 07/18 16:30 | 26 | [134] Nicolas Mahut v Jason Jung [131] | 4-6,4-6 | |
| ATP Newport | 07/17 15:00 | 25 | [116] Sergiy Stakhovsky v Jason Jung [131] | 4-6,6-3,3-6 | |
| Challenger Winnetka | 07/15 02:00 | 29 | [355] Evgeny Karlovskiy v Jason Jung [155] | 6-3,6-2 | |
| Challenger Winnetka | 07/13 19:20 | 28 | [155] Jason Jung v Collin Altamirano [490] | 6-2,6-2 | |
| Challenger Winnetka | 07/12 17:15 | 27 | [175] Mohamed Safwat v Jason Jung [155] | 2-6,6-3,3-6 | |
| Challenger Winnetka | 07/11 16:25 | 26 |
[212] Christopher Eubanks
v
Jason Jung [155] |
3-6,7-6,4-6 | |
| Challenger Winnetka | 07/10 17:30 | 25 |
[397] Thai-Son Kwiatkowski
v
Jason Jung [155] |
3-6,4-6 | |
| Wimbledon | 07/03 16:40 | 23 |
[47] Benoit Paire
v
Jason Jung [155] |
7-5,7-6,6-4 | |
| Wimbledon Qual | 06/28 12:45 | 45 | [121] Thomas Fabbiano v Jason Jung [154] | 6-4,6-2,3-6,6-3 | |
| Wimbledon Qual | 06/26 16:20 | 45 | [154] Jason Jung v Henri Laaksonen [142] | 7-6,6-4 | |
| Wimbledon Qual | 06/25 15:45 | 44 | [154] Jason Jung v Nikola Milojevic [164] | 6-4,6-0 | |
| Challenger Ilkley | 06/19 16:15 | 25 | [153] Jason Jung v Stefano Travaglia [141] | 5-7,3-6 | |
| Challenger Nottingham | 06/11 13:15 | 25 |
[152] Jason Jung v
Ramkumar Ramanathan
[128] 
|
7-6,5-7,4-6 | |
| French Open Qual | 05/21 11:45 | 44 |
[151] Jason Jung v
Lorenzo Sonego
[126] 
|
2-6,4-6 | |
| Challenger Busan | 05/18 05:35 | 27 | [85] Matthew Ebden v Jason Jung [152] | 6-2,6-2 | |
| Challenger Busan | 05/16 04:00 | 26 | [332] Zhe Li v Jason Jung [152] | 6-7,7-5,1-6 | |
| Challenger Busan | 05/14 08:05 | 25 | [285] Hiroki Moriya v Jason Jung [152] | 1-6,1-6 | |
| Challenger Gimcheon | 05/10 03:40 | 26 | [154] Jason Jung v Renta Tokuda [354] | 6-7,0-6 | |
| Challenger Gimcheon | 05/08 06:15 | 25 | [154] Jason Jung v Tatsuma Ito [159] | 6-3,5-7,7-6 | |
| Challenger Seoul | 05/03 01:30 | 26 | [249] Tsung-Hua Yang v Jason Jung [154] | 6-4,7-5 | |
| Challenger Seoul | 05/01 03:00 | 25 | Makoto Ochi v Jason Jung | 4-6,0-6 | |
| Challenger Taipei | 04/13 07:30 | 27 |
[157] Jason Jung v
Skjervøy
[155] 
|
6-3,6-7,6-7 |
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 representing 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 champion and former world No. 5 Kevin Anderson in the first round, followed by seventh seed Cameron Norrie in the second, before upsetting defending champion and third seed Reilly Opelka in the quarterfinals. He was eliminated in the semifinals by Italian veteran Andreas Seppi in straight sets.