Challenger Taipei 04/18 05:10 25 [160] Jason Jung v Lukas Lacko [106] 1-6,4-6
Challenger Leon 03/29 17:00 25 [304] Roberto Quiroz v Jason Jung [170] 6-1,6-2
Challenger Guadalajara 03/25 21:30 28 [214] Mirza Basic v Jason Jung [170] 6-3,6-3
Challenger Guadalajara 03/24 22:00 27 [170] Jason Jung v Mitchell Krueger [191] 6-1,6-3
Challenger Guadalajara 03/23 20:00 26 [170] Jason Jung v John-Patrick Smith [223] 6-4,7-6
Challenger Guadalajara 03/21 21:20 25 [170] Jason Jung v Hans Hach Verdugo [255] 6-2,7-6
Challenger Zhuhai 03/08 03:00 26 [170] Jason Jung v Luca Vanni [139] 4-6,4-6
Challenger Zhuhai 03/06 05:55 25 [162] Jan Satral v Jason Jung [170] 6-1,1-6,2-6
Challenger Yokohama 02/28 01:00 25 Soon Woo Kwon v Jason Jung 6-3,7-6
Davis Kupa 02/17 07:55 - Jason Jung v Yibing Wu Retired
Challenger Launceston 02/06 02:45 25 Jason Jung v Maverick Banes 4-6,6-4,3-6
Challenger Burnie 01/31 08:35 25 Luke Saville v Jason Jung 2-6,6-1,6-4
Challenger Kaohsiung 09/21 06:00 26 Jason Jung v Amir Weintraub 3-6,4-6
Challenger Kaohsiung 09/20 06:30 25 Yoshihito Nishioka v Jason Jung 4-6,3-6
Challenger Nanchang 09/16 08:30 28 Hyeon Chung v Jason Jung 6-3,6-4
Challenger Nanchang 09/15 03:00 27 Jason Jung v Jordan Thompson 7-6,6-3
Challenger Nanchang 09/14 03:40 26 Jason Jung v Yasutaka Uchiyama 6-3,7-6
Challenger Nanchang 09/13 07:55 25 Jason Jung v Yecong He 6-2,6-3
Challenger Shanghai 09/12 01:00 29 Jason Jung v Henri Laaksonen 3-6,3-6
Challenger Shanghai 09/10 03:00 28 Jordan Thompson v Jason Jung 4-6,4-6
Challenger Shanghai 09/09 03:00 27 Go Soeda v Jason Jung 2-6,5-7
Challenger Shanghai 09/08 06:10 26 Yuya Kibi v Jason Jung 7-6,4-6,3-6
Challenger Shanghai 09/06 02:00 25 Denys Molchanov v Jason Jung 2-6,3-6
Challenger Astana 2 07/26 05:00 25 Daniil Medvedev v Jason Jung 7-6,4-6,6-3
Challenger Astana 2 07/25 05:00 54 Jason Jung v Vitaly Kozyukov 6-1,6-1
Challenger Astana 2 07/23 13:00 46 Jason Jung v Yaraslav Shyla 7-5,6-4
ITF Canada F4 07/01 19:00 27 Blake Mott v Jason Jung 3-6,6-4,7-5
ITF Canada F4 06/30 19:50 26 Alexis Galarneau v Jason Jung 2-6,1-6
ITF Canada F4 06/29 17:00 25 Michael Genender v Jason Jung 2-6,3-6
ITF Canada F3 06/26 19:00 29 Jason Jung v Peter Polansky 1-6,4-6

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.