| ITF Korea F1 | 06/06 01:00 | 25 | Young-Hoon Jeong v Seong Chan Hong | 1-6,6-3,6-2 | |
| Challenger Busan | 05/15 06:30 | 25 | Seong Chan Hong v John-Patrick Smith | 2-6,4-6 | |
| Challenger Gimcheon Qual | 05/06 06:40 | 46 | Seong Chan Hong v Tung-Lin Wu | 4-6,7-6,2-6 | |
| Challenger Gimcheon Qual | 05/05 04:20 | 45 | Seong Chan Hong v Thomas Fancutt | 2-6,7-5,6-4 | |
| Challenger Seoul | 05/03 01:30 | 26 | Tatsuma Ito v Seong Chan Hong | 7-5,6-1 | |
| Challenger Seoul | 04/30 06:40 | 25 | Yasutaka Uchiyama v Seong Chan Hong | 6-2,4-6,5-7 | |
| ITF Japan F4 | 03/29 01:00 | 26 | Kuan-Yi Lee v Seong Chan Hong | 6-1,3-6,6-4 | |
| ITF Japan F4 | 03/27 01:00 | 25 | Seong Chan Hong v Xin Gao | 6-3,6-4 | |
| ITF Japan F3 | 03/24 02:00 | 29 | Seong Chan Hong v Makoto Ochi | 7-6,6-1 | |
| ITF Japan F3 | 03/23 02:00 | 28 | Tatsuma Ito v Seong Chan Hong | 5-7,6-2,2-6 | |
| ITF Japan F3 | 03/22 07:05 | 27 | Min-Kyu Song v Seong Chan Hong | 5-7,6-7 | |
| ITF Japan F3 | 03/22 03:00 | 26 | Seong Chan Hong v Shinji Hazawa | 7-6,6-3 | |
| ITF Japan F3 | 03/19 06:00 | 25 | Seong Chan Hong v Naoki Tajima | 6-1,4-6,6-4 | |
| ITF Japan F2 | 03/16 03:35 | 27 | Kaichi Uchida v Seong Chan Hong | 7-6,1-6,7-6 | |
| ITF Japan F2 | 03/15 01:00 | 26 | Yunosuke Tanaka v Seong Chan Hong | 3-6,3-6 | |
| ITF Japan F2 | 03/12 02:30 | 25 | Seong Chan Hong v Shuichi Sekiguchi | 6-4,1-6,7-6 | |
| Davis Cup | 02/02 07:40 | 27 | Aqeel Khan v Seong Chan Hong | 4-6,7-5,7-5 | |
| Challenger Gwangju | 09/19 06:35 | 25 | Seong-Chen Hong v Luke Saville | 6-2,4-6,6-7 | |
| ITF Korea F5 | 06/30 02:00 | 27 | Seong Chan Hong v Young Seok Kim | 6-7,4-6 | |
| ITF Korea F5 | 06/29 01:30 | 26 | Seong Chan Hong v Jung-Woong Na | 6-4,2-6,7-6 | |
| ITF Korea F5 | 06/28 01:00 | 25 | Seong Chan Hong v Dong-Hak Sin | 7-5,6-3 | |
| ITF Korea F5 | 06/27 01:30 | 62 | Seong Chan Hong v Seong Jae Han | 6-1,6-3 | |
| ITF Korea F5 | 06/26 01:30 | 62 | Seong Chan Hong v Seoung Hun Lee | 6-3,6-0 | |
| ITF Korea F3 | 06/13 02:00 | 25 | Young Seok Kim v Seong Chan Hong | 6-2,6-4 | |
| ITF Korea F2 | 06/09 02:00 | 27 | Min-Kyu Song v Seong Chan Hong | Retired | |
| ITF Korea F2 | 06/08 01:00 | 26 | Oh-Hee Kwon v Seong Chan Hong | Retired | |
| ITF Korea F2 | 06/07 06:55 | 25 | Ju-Hae Moon v Seong Chan Hong | 3-6,3-6 | |
| ITF Korea F1 | 06/04 03:30 | 29 | Daniel Nguyen v Seong Chan Hong | 6-4,5-7,6-2 | |
| ITF Korea F1 | 06/03 03:05 | 28 | Seong Chan Hong v Makoto Ochi | 6-1,7-6 | |
| ITF Korea F1 | 06/02 01:00 | 27 | Sang-Woo Noh v Seong Chan Hong | 4-6,2-6 |
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. 172 achieved on 15 April 2024 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.
2022: Maiden ATP Challenger title
He lifted his maiden trophy at the ATP 2022 Matsuyama Challenger.
2023-2024: Masters debut, Three Challenger finals
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.