Challenger Nonthaburi | 08/30 08:15 | 25 | [418] Yunseong Chung v Billy Harris [305] | 3-6,6-4,4-6 | |
Challenger Nonthaburi | 08/29 06:10 | 19 | [418] Yunseong Chung v Timo Legout [495] | 7-6,6-2 | |
Challenger Nonthaburi Qual | 08/28 07:25 | 14 | [414] Yunseong Chung v Dayne Kelly [490] | 6-4,3-6,6-4 | |
Challenger Nonthaburi | 08/21 07:00 | 14 | Yunseong Chung v Yuta Shimizu | Cancelled | |
Challenger Santo Domingo | 08/15 19:40 | 19 | [289] Nicolas Mejia v Yunseong Chung [423] | 6-3,4-6,6-4 | |
Challenger Santo Domingo | 08/14 21:00 | 14 | [107] Evan King v Yunseong Chung [414] | 2-6,5-7 | |
Challenger Chicago | 08/08 18:00 | 14 | [186] Enzo Couacaud v Yunseong Chung [414] | 6-4,6-2 | |
Challenger Lexington | 08/01 17:25 | 25 | [403] Yunseong Chung v Roberto Quiroz [267] | 2-6,7-5,1-6 | |
Challenger Bogota | 07/04 19:05 | 19 | [422] Yunseong Chung v Arklon H D P Cordova [277] | 3-6,7-6,6-7 | |
Challenger Bogota | 07/03 19:45 | 14 | Yunseong Chung v Gabriel Tumasonis | 6-4,2-6,6-2 | |
Challenger Cali | 06/30 17:30 | 27 | [422] Yunseong Chung v Facundo Mena [160] | 3-6,7-5,6-7 | |
Challenger Cali | 06/29 18:00 | 26 | [247] Gerald Melzer v Yunseong Chung [422] | 4-6,2-6 | |
Challenger Cali | 06/28 17:00 | 25 | [422] Yunseong Chung v Mateus Alves [411] | 6-4,6-0 | |
Challenger Cali | 06/27 15:00 | 19 | Yunseong Chung v Ignacio Monzon | 1-6,7-6,6-2 | |
Challenger Cali | 06/26 15:30 | 14 | Yunseong Chung v Miguel Angel Sarria | 6-2,6-0 | |
ITF M25 Tulsa | 06/23 15:15 | 26 | Stefan Dostanic v Yunseong Chung | Retired | |
ITF M25 Tulsa | 06/22 01:10 | 25 | Ezekiel Clark v Yunseong Chung | 4-6,3-6 | |
ITF M25 Santo Domingo | 06/17 14:00 | 27 | Martin Damm v Yunseong Chung | 2-6,6-2,7-6 | |
ITF M25 Santo Domingo | 06/16 13:30 | 26 | Arvid Nordquist v Yunseong Chung | 6-7,4-6 | |
ITF M25 Santo Domingo | 06/15 15:15 | 25 | Alejandro Jose Gandini v Yunseong Chung | 2-6,2-6 | |
Challenger Orlando | 06/05 20:05 | 14 | Matija Pecotic v Yunseong Chung | 0-6,6-3,6-2 | |
Challenger Little Rock | 05/30 16:40 | 19 | [357] Adrian Menendez-Maceiras v Yunseong Chung [392] | 1-6,6-0,6-4 | |
Challenger Little Rock | 05/29 18:05 | 14 | [445] Christian Langmo v Yunseong Chung [392] | Retired | |
Challenger Morelos | 04/30 20:00 | 28 | [448] Adrian Menendez-Maceiras v Yunseong Chung [374] | 1-6,6-1,6-4 | |
Challenger Morelos | 04/29 18:00 | 27 | [374] Yunseong Chung v Keegan Smith [421] | 6-1,6-4 | |
Challenger Morelos | 04/27 16:25 | 26 | [347] Aleksandar Kovacevic v Yunseong Chung [374] | 6-3,5-7,4-6 | |
Challenger Morelos | 04/26 00:30 | 25 | [408] Bernard Tomic v Yunseong Chung [374] | 3-6,6-3,4-6 | |
Challenger Tallahassee | 04/18 16:30 | 19 | [373] Yunseong Chung v Christian Langmo [471] | 5-7,5-7 | |
Challenger Tallahassee | 04/17 16:50 | 14 | Yunseong Chung v John McNally | 6-3,6-4 | |
Challenger Salinas | 04/06 17:30 | 26 | [374] Yunseong Chung v JC Aragone [376] | 5-7,4-6 |
Chung Yun-seong (Korean: 정윤성; born 27 March 1998) is a South Korean tennis player.
Chung has a career high ATP singles ranking of No. 233 achieved on 22 July 2019. He also has a career high ATP doubles ranking of No. 129 achieved on 22 May 2023. Chung has won three doubles ATP Challenger titles as well as four ITF singles and five doubles titles.
On the junior tour, Chung had a career-high combined ranking of 3 achieved on 21 March 2016. Chung was a semifinalist at the 2016 Australian Open boys' singles event and the 2015 US Open boys' singles event where he fell to both eventual champions Oliver Anderson and Taylor Fritz, respectively. Chung was also a singles finalist at the Osaka Mayor's Cup in 2014.
He and Orlando Luz lost to Yishai Oliel of Israel and Patrik Rikl of the Czech Republic in the final of the 2016 French Open boys' doubles, 6–3, 6–4.