| Winnetka, USA | 07/11 17:40 | 26 | Jason Jung v Pervolarakis, Michail | 6-2,6-4 | |
| Winnetka, USA | 07/10 15:00 | 25 | [117] Jason Jung v Neuchrist, Maximilian [409] | 6-2,6-2 | |
| Wimbledon, London, Great Britain | 06/24 11:30 | 44 | [118] Jason Jung v Quiroz, Roberto [226] | 6-7,6-7 | |
| Ilkley, Great Britain | 06/20 13:00 | 26 | [167] Dominik Koepfer v Jason Jung [116] | 7-6,6-4 | |
| Ilkley, Great Britain | 06/19 13:45 | 25 | [147] Alex Bolt v Jason Jung [116] | 6-7,1-6 | |
| s-Hertogenbosch, Netherlands | 06/08 10:25 | 64 | [120] Jason Jung v Marcos Giron [161] | 2-6,7-5,2-6 | |
| Challenger - Gwangju | 05/19 03:25 | 29 | [129] Jason Jung v Sela, Dudi [240] | 6-4,6-2 | |
| Challenger - Gwangju | 05/18 03:55 | 28 | [129] Jason Jung v Akira Santillan [251] | 6-4,6-3 | |
| Challenger - Gwangju | 05/17 05:40 | 27 | [245] Li, Zhe v Jason Jung [129] | 6-3,1-6,4-6 | |
| Challenger - Gwangju | 05/16 02:00 | 26 | [167] Bemelmans, Ruben v Jason Jung [129] | 2-6,5-7 | |
| Challenger - Gwangju | 05/15 03:50 | 25 | [301] Song, Min-Kyu v Jason Jung [129] | 3-6,2-6 | |
| Challenger - Busan | 05/07 03:35 | 25 | [129] Jason Jung v Akira Santillan [283] | 3-6,6-3,2-6 | |
| Challenger Seoul | 05/01 03:50 | 25 | [293] Akira Santillan v Jason Jung [132] | 6-3,5-7,7-6 | |
| Anning, China | 04/18 06:45 | 26 | [134] Jason Jung v Goncalo Oliveira [295] | 3-6,6-7 | |
| Anning, China | 04/17 03:20 | 25 | [134] Jason Jung v Ignatik, Uladzimir [239] | 6-3,5-7,7-5 | |
| Taipei, Chinese Taipei | 04/12 05:45 | 27 | [134] Jason Jung v Soeda, Go [207] | 6-7,1-6 | |
| Taipei, Chinese Taipei | 04/11 09:00 | 26 | [134] Jason Jung v James Duckworth [160] | 6-2,6-2 | |
| Taipei, Chinese Taipei | 04/10 09:55 | 25 | [134] Jason Jung v Tung-Lin Wu [309] | 6-4,6-4 | |
| ATP - Miami | 03/18 18:45 | 44 | [98] Casper Ruud v Jason Jung [134] | 7-6,7-5 | |
| Challenger - Phoenix | 03/12 03:00 | 24 | [132] Jason Jung v Chun Hsin Tseng [449] | 6-3,3-6,2-6 | |
| ATP - Indian Wells | 03/05 21:55 | 44 | [97] Gunneswaran, Prajnesh v Jason Jung [132] | 7-5,6-4 | |
| Challenger - Indian Wells | 03/01 20:05 | 27 | [105] Daniel Evans v Jason Jung [135] | 6-4,6-4 | |
| Challenger - Indian Wells | 02/28 18:00 | 26 | [135] Jason Jung v Filip Krajinovic [82] | 7-5,6-3 | |
| Challenger - Indian Wells | 02/26 22:25 | 25 | [135] Jason Jung v Mitchell Krueger [159] | 6-1,6-4 | |
| ATP - Delray Beach | 02/19 17:55 | 25 | [34] Steve Johnson v Jason Jung [131] | 7-6,6-4 | |
| New York, USA | 02/15 20:00 | 27 | [49] Querrey, Sam v Jason Jung [143] | 6-3,3-6,6-3 | |
| New York, USA | 02/15 00:30 | 26 | [143] Jason Jung v Frances Tiafoe [29] | 6-3,7-5 | |
| New York, USA | 02/12 17:50 | 25 | [128] Ramkumar Ramanathan v Jason Jung [143] | 3-6,6-3,1-6 | |
| Challenger Dallas | 02/08 16:00 | 27 | [130] Fratangelo, Bjorn v Jason Jung [123] | 7-6,6-7,6-1 | |
| Challenger Dallas | 02/07 18:30 | 26 | [323] Gojo, Borna v Jason Jung [123] | 2-6,6-7 |
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 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.