| Challenger - Monterrey | 03/10 21:00 | 27 | [278] Prajnesh Gunneswaran v Jason Jung [223] | 1-6,7-5,6-4 | |
| Challenger - Monterrey | 03/09 18:00 | 26 | [461] Evan Zhu v Jason Jung [223] | 2-6,5-7 | |
| Challenger - Monterrey | 03/08 22:50 | 25 | Strong Kirchheimer v Jason Jung | 4-6,1-6 | |
| ATP - Delray Beach | 02/13 20:10 | 19 | [121] Liam Broady v Jason Jung [171] | 6-4,6-4 | |
| ATP - Delray Beach | 02/12 19:40 | 14 | [187] Renzo Olivo v Jason Jung [171] | 2-6,3-6 | |
| ATP - Dallas | 02/07 18:00 | 19 | [153] Jurij Rodionov v Jason Jung [171] | 4-6,6-2,6-3 | |
| ATP - Dallas | 02/06 17:00 | 14 | [284] Go Soeda v Jason Jung [173] | 6-3,1-6,6-7 | |
| Challenger - Cleveland | 02/02 00:35 | 25 | [173] Jason Jung v Emilio Gomez [142] | 3-6,4-6 | |
| Challenger Columbus | 01/25 20:30 | 25 | [176] Jason Jung v Ernesto Escobedo [141] | 1-6,4-6 | |
| Open da Austrália | 01/10 07:15 | 14 | [126] Yannick Hanfmann v Jason Jung [178] | 6-7,7-5,6-0 | |
| Challenger - Bendigo | 01/06 06:20 | 26 | [164] Ernesto Escobedo v Jason Jung [178] | 6-2,4-6,6-2 | |
| Challenger - Bendigo | 01/04 06:35 | 25 | [213] Camilo U Carabelli v Jason Jung [178] | 6-7,6-7 | |
| Challenger - Champaign | 11/18 18:45 | 26 | [245] Go Soeda v Jason Jung [177] | 6-4,5-7,6-4 | |
| Challenger - Champaign | 11/16 20:00 | 25 | [227] Mikael Torpegaard v Jason Jung [177] | 2-6,6-3,4-6 | |
| Challenger - Knoxville | 11/10 17:15 | 26 | [173] Jason Jung v Christian Harrison [263] | Retired | |
| Challenger - Knoxville | 11/08 19:35 | 25 | [173] Jason Jung v Jason Kubler [208] | 6-4,6-1 | |
| Challenger - Charlottesville | 11/02 19:05 | 25 | [173] Jason Jung v Christian Harrison [270] | 5-7,4-6 | |
| Challenger - Las Vegas | 10/25 20:55 | 25 | [166] Jason Jung v Thai-Son Kwiatkowski [232] | 5-7,2-6 | |
| ATP - Indian Wells | 10/05 19:25 | 14 | [165] Jason Jung v Stefan Kozlov [253] | Retired | |
| Challenger Columbus | 09/20 16:40 | 25 | [166] Jason Jung v Ryan Peniston [309] | 3-6,4-6 | |
| Challenger Cary | 09/14 16:55 | 25 | [481] Rinky Hijikata v Jason Jung [166] | 6-4,6-4 | |
| Open dos EUA | 08/26 20:30 | 15 | [129] Mikhail Kukushkin v Jason Jung [168] | 6-4,6-3 | |
| Open dos EUA | 08/25 21:20 | 14 | [166] Sebastian Ofner v Jason Jung [168] | 5-7,4-6 | |
| ATP - Washington | 07/31 16:00 | 14 | [178] Go Soeda v Jason Jung [159] | 6-4,6-7,6-4 | |
| ATP - Atlanta | 07/25 16:25 | 19 | [159] Jason Jung v Bjorn Fratangelo [188] | 3-6,6-1,5-7 | |
| ATP - Atlanta | 07/24 19:25 | 26 | [159] Jason Jung v Lukas Lacko [191] | 6-4,6-7,6-3 | |
| ATP - Los Cabos | 07/20 00:00 | 25 | [159] Jason Jung v Evgeny Donskoy [157] | 1-6,4-6 | |
| ATP - Newport | 07/15 16:45 | 27 | [37] Alexander Bublik v Jason Jung [163] | 6-2,6-4 | |
| ATP - Newport | 07/14 17:55 | 26 | [163] Jason Jung v Tennys Sandgren [78] | 6-2,6-2 | |
| ATP - Newport | 07/13 16:20 | 25 | [248] Brayden Schnur v Jason Jung [163] | 5-7,7-6,6-7 |
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.