| Challenger Gwangju | 04/18 03:30 | 26 | [172] Seongchan Hong v Sho Shimabukuro [173] | 4-6,4-6 | |
| Challenger Gwangju | 04/16 05:10 | 25 | [239] Illya Marchenko v Seongchan Hong [172] | 3-6,2-6 | |
| Challenger Busan | 04/14 03:15 | 29 | Yasutaka Uchiyama v Seongchan Hong | 7-6,6-3 | |
| Challenger Busan | 04/13 04:50 | 28 | Soonwoo Kwon v Seongchan Hong | Walkover | |
| Challenger Busan | 04/12 05:05 | 27 | [194] Coleman Wong v Seongchan Hong [201] | 4-6,6-3,2-6 | |
| Challenger Busan | 04/11 03:55 | 26 | [211] Mark Lajal v Seongchan Hong [201] | 4-6,4-6 | |
| Challenger Busan | 04/09 04:10 | 25 | [201] Seongchan Hong v Otto Virtanen [159] | 6-2,6-2 | |
| Challenger Phoenix | 03/11 19:30 | 14 | [112] David Goffin v Seongchan Hong [227] | 6-2,6-4 | |
| ATP Indian Wells | 03/07 22:15 | 23 | [81] Jakub Mensik v Seongchan Hong [227] | 6-3,6-4 | |
| ATP Indian Wells | 03/05 18:00 | 15 | [101] Sumit Nagal v Seongchan Hong [227] | 6-2,2-6,6-7 | |
| ATP Indian Wells | 03/04 18:00 | 14 | Soonwoo Kwon v Seongchan Hong | 3-6,3-6 | |
| Challenger New Delhi | 02/27 05:45 | 25 | [221] Seongchan Hong v Tristan Boyer [255] | 3-6,7-6,6-7 | |
| Challenger Pune | 02/20 05:45 | 25 | [221] Seongchan Hong v Maks Kasnikowski [267] | 4-6,2-6 | |
| Challenger Bengaluru | 02/18 12:30 | 29 | [221] Seongchan Hong v Stefano Napolitano [204] | 6-4,3-6,3-6 | |
| Challenger Bengaluru | 02/17 10:00 | 28 | [221] Seongchan Hong v Oriol Roca Batalla [209] | 6-2,3-6,6-3 | |
| Challenger Bengaluru | 02/16 08:30 | 27 | [462] Ramkumar Ramanathan v Seongchan Hong [221] | 5-7,7-5,4-6 | |
| Challenger Bengaluru | 02/14 08:50 | 26 | Alexey Zakharov v Seongchan Hong | 4-6,5-7 | |
| Challenger Bengaluru | 02/13 07:30 | 25 | [243] Tristan Schoolkate v Seongchan Hong [221] | 4-6,3-6 | |
| Challenger Bengaluru | 02/12 04:30 | 25 | Seong Chan Hong v Vasek Pospisil | Cancelled | |
| Davis Cup | 02/03 21:40 | 168 | [132] Gabriel Diallo v Seongchan Hong [224] | 7-5,4-6,6-1 | |
| Davis Cup | 02/02 23:05 | 168 | [486] Vasek Pospisil v Seongchan Hong [224] | 6-4,6-3 | |
| Challenger Nonthaburi | 01/21 03:30 | 29 | [171] Matteo Gigante v Seongchan Hong [247] | 6-4,6-1 | |
| Challenger Nonthaburi | 01/20 03:30 | 28 | [279] Giovanni Fonio v Seongchan Hong [247] | 4-6,1-6 | |
| Challenger Nonthaburi | 01/19 03:30 | 27 | [213] Dennis Novak v Seongchan Hong [247] | Retired | |
| Challenger Nonthaburi | 01/17 07:10 | 26 | [247] Seongchan Hong v Benjamin Hassan [149] | 6-2,6-3 | |
| Challenger Nonthaburi | 01/16 04:15 | 25 | [247] Seongchan Hong v Oriol Roca Batalla [210] | 3-6,7-6,6-3 | |
| Challenger Nonthaburi | 01/15 05:55 | 19 | [247] Seongchan Hong v Salvatore Caruso [289] | 6-2,6-7,6-2 | |
| Challenger Nonthaburi | 01/14 06:55 | 14 | Seongchan Hong v Siwanat Auytayakul | 7-6,6-1 | |
| Challenger Nonthaburi | 01/09 03:00 | 25 | [253] Brandon Holt v Seongchan Hong [248] | 6-2,6-2 | |
| Challenger Nonthaburi | 01/05 04:00 | 28 | [329] Lucas Pouille v Seongchan Hong [273] | 6-3,6-3 |
Wikipedia - Hong Seong-chan
Hong Seong-chan (born 30 June 1997) is a South Korean tennis player. Hong has a career high ATP singles ranking of world No. 184 achieved on 22 May 2023 and a doubles ranking of No. 359 achieved on 16 January 2023. He is the current Korean No. 1 singles player.
Since 2015, Hong has been a member of the South Korean Davis Cup team.
History
Juniors
Hong reached the final of the 2015 Australian Open junior championships, falling to top seed Roman Safiullin in the final.
Hong had a career high junior ranking of No. 3.
2023-2024: Masters debut
He reached the last round of qualifying at the 2023 Rolex Shanghai Masters.
Ranked No. 227, he qualified for the 2024 BNP Paribas Open having entered the qualifying competition as an alternate after Yosuke Watanuki‘s withdrawal, making his Masters debut.