Challenger Dallas | 02/06 16:00 | 25 | [250] Christian Harrison v Jason Jung [123] | 7-6,6-7,5-7 | |
Challenger Cleveland | 01/30 18:30 | 25 | [115] Jason Jung v Jeffrey John Wolf [291] | 3-6,4-6 | |
Challenger Newport Beach | 01/25 21:35 | 27 | [120] Jason Jung v Brayden Schnur [196] | 2-6,1-6 | |
Challenger Newport Beach | 01/24 19:45 | 26 | [120] Jason Jung v Dennis Novikov [257] | 4-6,6-4,7-5 | |
Challenger Newport Beach | 01/22 19:20 | 25 | [120] Jason Jung v Santiago Giraldo [253] | 7-6,7-6 | |
Australian Open | 01/10 00:50 | 45 | [120] Jason Jung v Hiroki Moriya [185] | 2-6,3-6 | |
Australian Open | 01/07 23:00 | 44 | [120] Jason Jung v Gian Marco Moroni [227] | 3-6,6-1,7-6 | |
ATP Pune | 12/29 10:40 | 64 | [124] Jason Jung v Saketh Myneni [259] | 1-6,7-5,2-6 | |
Challenger Houston | 11/16 16:00 | 27 | [221] Kamil Majchrzak v Jason Jung [130] | 7-6,6-7,6-3 | |
Challenger Houston | 11/15 18:45 | 26 | [307] Enzo Couacaud v Jason Jung [130] | 1-6,6-7 | |
Challenger Houston | 11/13 20:05 | 25 | [239] Roberto Cid Subervi v Jason Jung [130] | 1-6,1-6 | |
Challenger Knoxville | 11/08 19:20 | 26 | [172] Nikola Milojevic v Jason Jung [128] | 6-0,6-4 | |
Challenger Knoxville | 11/07 18:05 | 25 | Timo Stodder v Jason Jung | 1-6,3-6 | |
Challenger Charlottesville | 10/29 18:30 | 25 | [135] Bjorn Fratangelo v Jason Jung [126] | 6-4,6-1 | |
Challenger Las Vegas | 10/26 18:00 | 27 | [235] John-Patrick Smith v Jason Jung [127] | 7-6,6-3 | |
Challenger Las Vegas | 10/25 19:20 | 26 | [315] Roberto O-Olmedo v Jason Jung [127] | 4-6,4-6 | |
Challenger Las Vegas | 10/23 18:00 | 25 | [307] Alexander Sarkissian v Jason Jung [127] | 6-7,4-6 | |
Challenger Calgary | 10/17 19:55 | 26 | Borna Gojo v Jason Jung | 7-6,6-2 | |
Challenger Calgary | 10/16 02:05 | 25 | [382] Steven Diez v Jason Jung [128] | 3-6,7-6,3-6 | |
ATP Shenzhen | 09/25 15:20 | 25 | [122] Jason Jung v Fernando Verdasco [28] | 3-6,2-6 | |
ATP Shenzhen | 09/23 07:00 | 164 | [123] Jason Jung v Brayden Schnur [261] | 7-6,6-2 | |
ATP Shenzhen | 09/22 07:00 | 64 | [123] Jason Jung v James Ward [223] | 6-4,7-6 | |
Challenger Kaohsiung | 09/20 10:00 | 26 | [123] Jason Jung v Duckhee Lee [232] | 6-7,4-6 | |
Challenger Kaohsiung | 09/18 10:00 | 25 | [123] Jason Jung v Yunseong Chung [296] | 6-3,6-4 | |
Challenger Shanghai | 09/13 05:05 | 26 | [121] Jason Jung v Di Wu [289] | 3-6,0-6 | |
Challenger Shanghai | 09/11 03:00 | 25 | Jason Jung v Runhao Hua | 4-6,7-5,6-3 | |
Challenger Zhangjiagang | 09/09 04:00 | 29 | [115] Jason Jung v Yasutaka Uchiyama [271] | 2-6,2-6 | |
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 |
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.
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.