| Challenger Winnetka | 07/11 17:40 | 26 | Jason Jung v Michail Pervolarakis | 6-2,6-4 | |
| Challenger Winnetka | 07/10 15:00 | 25 | [117] Jason Jung v Maximilian Neuchrist [409] | 6-2,6-2 | |
| Wimbledon | 06/24 11:30 | 44 | [118] Jason Jung v Roberto Quiroz [226] | 6-7,6-7 | |
| Challenger Ilkley | 06/20 13:00 | 26 | [167] Dominik Koepfer v Jason Jung [116] | 7-6,6-4 | |
| Challenger Ilkley | 06/19 13:45 | 25 | [147] Alex Bolt v Jason Jung [116] | 6-7,1-6 | |
| ATP Hertogenbosch | 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 Dudi Sela [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] Zhe Li v Jason Jung [129] | 6-3,1-6,4-6 | |
| Challenger Gwangju | 05/16 02:00 | 26 | [167] Ruben Bemelmans v Jason Jung [129] | 2-6,5-7 | |
| Challenger Gwangju | 05/15 03:50 | 25 | [301] Min-Kyu Song 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 | |
| Challenger Anning | 04/18 06:45 | 26 | [134] Jason Jung v Goncalo Oliveira [295] | 3-6,6-7 | |
| Challenger Anning | 04/17 03:20 | 25 | [134] Jason Jung v Uladzimir Ignatik [239] | 6-3,5-7,7-5 | |
| Challenger Taipei | 04/12 05:45 | 27 | [134] Jason Jung v Go Soeda [207] | 6-7,1-6 | |
| Challenger Taipei | 04/11 09:00 | 26 | [134] Jason Jung v James Duckworth [160] | 6-2,6-2 | |
| Challenger 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] Prajnesh Gunneswaran 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 | |
| ATP New York | 02/15 20:00 | 27 | [49] Sam Querrey v Jason Jung [143] | 6-3,3-6,6-3 | |
| ATP New York | 02/15 00:30 | 26 | [143] Jason Jung v Frances Tiafoe [29] | 6-3,7-5 | |
| ATP New York | 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] Bjorn Fratangelo v Jason Jung [123] | 7-6,6-7,6-1 | |
| Challenger Dallas | 02/07 18:30 | 26 | [323] Borna Gojo 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.