| Open de França | 09/23 09:45 | 15 | [125] Jason Jung v Tommy Robredo [220] | 6-4,6-3 | |
| Open de França | 09/21 10:20 | 14 | [125] Jason Jung v Yosuke Watanuki [231] | 6-2,6-0 | |
| Challenger - Aix en Provence | 09/08 13:35 | 25 | [110] Pedro Sousa v Jason Jung [122] | 3-6,6-2,6-4 | |
| Open dos EUA | 08/31 15:00 | 23 | [122] Jason Jung v Federico Coria [103] | Retired | |
| Challenger - Monterrey | 03/06 18:00 | 27 | [120] Jason Jung v Ernesto Escobedo [200] | 2-6,2-6 | |
| Challenger - Monterrey | 03/05 17:00 | 26 | [120] Jason Jung v Lorenzo Giustino [153] | 6-1,6-2 | |
| Challenger - Monterrey | 03/03 23:20 | 25 | [120] Jason Jung v Collin Altamirano [377] | 7-6,6-7,7-6 | |
| ATP - Acapulco | 02/26 01:00 | 25 | [119] Jason Jung v Alexander Zverev [7] | 6-7,1-6 | |
| ATP - Acapulco | 02/23 23:00 | 164 | [221] Daniel Altmaier v Jason Jung [119] | 1-6,3-6 | |
| ATP - Acapulco | 02/23 02:35 | 64 | [156] Steven Diez v Jason Jung [119] | 2-6,2-6 | |
| ATP - Delray Beach | 02/18 19:35 | 25 | [269] Noah Rubin v Jason Jung [119] | Retired | |
| ATP - Nova Iorque | 02/16 00:00 | 28 | [98] Andreas Seppi v Jason Jung [131] | 6-3,6-2 | |
| ATP - Nova Iorque | 02/15 00:30 | 27 | [40] Reilly Opelka v Jason Jung [131] | 7-5,4-6,4-6 | |
| ATP - Nova Iorque | 02/13 18:55 | 26 | [131] Jason Jung v Cameron Norrie [59] | 6-4,6-4 | |
| ATP - Nova Iorque | 02/12 02:10 | 25 | [131] Jason Jung v Kevin Anderson [120] | 7-6,6-4 | |
| ATP - Nova Iorque | 02/10 17:00 | 164 | [131] Jason Jung v Mitchell Krueger [221] | 6-2,6-4 | |
| ATP - Nova Iorque | 02/09 17:00 | 64 | Jason Jung v Gary Kushnirovich | 6-3,6-2 | |
| Challenger - Dallas | 02/06 20:00 | 26 | [156] Emilio Gomez v Jason Jung [128] | 4-6,6-4,7-6 | |
| Challenger - Dallas | 02/05 00:35 | 25 | [314] Kevin King v Jason Jung [128] | 6-7,4-6 | |
| Challenger - Newport Beach | 01/29 20:30 | 25 | Christopher Eubanks v Jason Jung | 6-4,7-5 | |
| Open da Austrália | 01/16 07:55 | 45 | [186] Daniel Elahi Galan v Jason Jung [125] | 6-3,3-6,6-3 | |
| Open da Austrália | 01/14 03:45 | 44 | [255] Donald Young v Jason Jung [125] | 4-6,7-6,1-6 | |
| Challenger - Canberra | 01/06 23:00 | 24 | [194] Darian King v Jason Jung [125] | 4-6,6-4,6-3 | |
| Open da Austrália - Wild Card | 12/08 06:00 | 29 | [128] Jason Jung v Tatsuma Ito [148] | 5-7,4-6 | |
| Open da Austrália - Wild Card | 12/07 04:30 | 28 | [128] Jason Jung v Duckhee Lee [250] | 6-2,6-1 | |
| Open da Austrália - Wild Card | 12/06 02:00 | 27 | Jason Jung v Yuki Mochizuki | 6-1,6-4 | |
| Open da Austrália - Wild Card | 12/05 04:55 | 26 | Jason Jung v Jie Cui | 6-3,6-4 | |
| Challenger - Houston | 11/15 22:35 | 27 | [123] Marcos Giron v Jason Jung [130] | 6-1,2-6,6-2 | |
| Challenger - Houston | 11/15 19:50 | 26 | [217] Alexey Vatutin v Jason Jung [130] | 5-7,2-6 | |
| Challenger - Houston | 11/13 16:00 | 25 | [350] Daniel Nguyen v Jason Jung [130] | 3-6,2-6 |
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 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.