| Challenger Shenzhen 2 | 11/01 04:00 | 27 | [133] Jason Jung v Frederico Ferreira Silva [202] | 6-7,6-4,4-6 | |
| Challenger Shenzhen 2 | 10/31 02:00 | 26 |
[133] Jason Jung v
Tung-Lin Wu
[234] 
|
7-6,6-4 | |
| Challenger Shenzhen 2 | 10/29 06:25 | 25 | [133] Jason Jung v Bruno Santanna [410] | 6-4,6-3 | |
| Challenger Liuzhou | 10/25 02:00 | 27 |
[353] Borna Gojo
v
Jason Jung [134] |
7-6,6-1 | |
| Challenger Liuzhou | 10/24 02:00 | 26 |
Jie Cui
v
Jason Jung |
5-7,4-6 | |
| Challenger Liuzhou | 10/23 03:55 | 25 | [172] Toshihide Matsui v Jason Jung [134] | 2-6,2-6 | |
| Challenger Ningbo | 10/15 08:40 | 25 | [135] Jason Jung v Akira Santillan [246] | 7-6,6-7,5-7 | |
| ATP Beijing | 09/28 08:00 | 64 |
[132] Jason Jung v
Dominik Koepfer
[85] 
|
3-6,7-6,4-6 | |
| ATP Chengdu | 09/23 06:30 | 25 | [97] Bradley Klahn v Jason Jung [132] | 4-6,6-3,7-6 | |
| ATP Chengdu | 09/22 05:10 | 164 | [366] Luke Saville v Jason Jung [132] | 4-6,2-6 | |
| ATP Chengdu | 09/21 06:50 | 64 | [242] Akira Santillan v Jason Jung [132] | 5-7,6-3,6-7 | |
| Challenger Kaohsiung | 09/19 10:55 | 26 |
[144] Alex Bolt
v
Jason Jung [132] |
7-5,4-6,7-6 | |
| Challenger Kaohsiung | 09/18 10:00 | 25 | [444] Renta Tokuda v Jason Jung [132] | 2-6,3-6 | |
| Davis Cup | 09/15 04:45 | - | Pak Long Yeung v Jason Jung | Cancelled | |
| Davis Cup | 09/14 06:00 | - |
Chak L C Wong
v
Jason Jung |
1-6,2-6 | |
| US Open | 08/22 15:00 | 45 | [140] Jiri Vesely v Jason Jung [121] | 6-4,5-7,7-5 | |
| US Open | 08/20 16:15 | 44 | [198] Donald Young v Jason Jung [121] | 3-6,7-6,5-7 | |
| Challenger Vancouver | 08/18 21:15 | 29 | [76] Ricardas Berankis v Jason Jung [129] | 6-3,5-7,6-4 | |
| Challenger Vancouver | 08/17 22:00 | 28 |
[195] Maxime Janvier
v
Jason Jung [129] |
5-7,6-7 | |
| Challenger Vancouver | 08/16 23:35 | 27 |
[129] Jason Jung v
Marc Polmans
[166] 
|
5-7,6-4,6-4 | |
| Challenger Vancouver | 08/15 19:30 | 26 | [125] Evgeny Donskoy v Jason Jung [129] | 6-4,3-6,4-6 | |
| Challenger Vancouver | 08/13 17:00 | 25 | [186] Ruben Bemelmans v Jason Jung [129] | 4-6,2-6 | |
| ATP Los Cabos | 07/30 03:10 | 25 | [129] Ernests Gulbis v Jason Jung [134] | 6-4,7-6 | |
| ATP Los Cabos | 07/29 01:40 | 164 | [138] Jason Jung v Danilo Petrovic [250] | 6-4,7-6 | |
| ATP Los Cabos | 07/28 01:25 | 64 | Jason Jung v Gerardo L Villasenor | 6-1,3-6,6-0 | |
| ATP Atlanta | 07/23 19:30 | 25 |
[55] Daniel Evans
v
Jason Jung [138] |
6-1,6-1 | |
| ATP Atlanta | 07/21 18:50 | 164 | [187] Donald Young v Jason Jung [127] | 1-6,6-7 | |
| ATP Atlanta | 07/20 14:00 | 64 |
[150] Alex Bolt
v
Jason Jung [127] |
6-7,3-6 | |
| ATP Newport | 07/16 17:00 | 25 | [167] Viktor Troicki v Jason Jung [127] | 3-6,7-5,7-5 | |
| Challenger Winnetka | 07/13 01:20 | 27 |
[117] Jason Jung v
Thanasi Kokkinakis
[192] 
|
6-7,1-6 |
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 inactive 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.