| 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 | |
| Challenger Nonthaburi | 01/04 05:15 | 27 | Seongchan Hong v Marat Sharipov | 3-6,6-3,6-2 | |
| Challenger Nonthaburi | 01/03 04:45 | 26 | [206] Mark Lajal v Seongchan Hong [273] | 6-2,4-6,5-7 | |
| Challenger Nonthaburi | 01/02 05:55 | 25 | [273] Seongchan Hong v Pierre-Hugues Herbert [237] | 6-4,2-6,6-3 | |
| Challenger Nonthaburi | 01/01 04:35 | 19 | [273] Seongchan Hong v Hady Habib [301] | 4-6,6-3,6-2 | |
| Challenger Nonthaburi | 12/31 06:00 | 14 | [273] Seongchan Hong v Nick Hardt [373] | 1-6,6-1,6-3 | |
| Challenger Yokkaichi | 11/27 03:45 | 25 | [272] Seongchan Hong v Omar Jasika [320] | 7-6,4-6,2-6 | |
| Challenger Yokohama | 11/22 02:30 | 26 | [297] Yasutaka Uchiyama v Seongchan Hong [274] | 2-6,6-4,6-4 | |
| Challenger Yokohama | 11/20 06:15 | 25 | [280] Seongchan Hong v Jurij Rodionov [107] | 7-6,7-6 | |
| Challenger Kobe | 11/15 06:55 | 26 | [155] Sho Shimabukuro v Seongchan Hong [280] | 6-4,7-6 | |
| Challenger Kobe | 11/13 05:10 | 25 | [319] Omar Jasika v Seongchan Hong [218] | 3-6,1-6 | |
| Challenger Matsuyama | 11/07 02:45 | 25 | [218] Seongchan Hong v Luca Nardi [143] | 5-7,6-3,6-7 | |
| Challenger Sydney | 10/30 23:00 | 25 | [422] Rio Noguchi v Seongchan Hong [215] | 6-2,6-2 | |
| Challenger Playford | 10/27 00:30 | 27 | [223] Seongchan Hong v Rinky Hijikata [70] | 1-6,1-6 | |
| Challenger Playford | 10/26 02:25 | 26 | [223] Seongchan Hong v Naoki Nakagawa [360] | 6-3,6-3 | |
| Challenger Playford | 10/24 03:00 | 25 | Seongchan Hong v Jayden Court | 7-6,6-3 | |
| ATP Shanghai | 10/03 04:30 | 15 | [198] Seongchan Hong v Dane Sweeny [256] | 2-6,1-6 | |
| ATP Shanghai | 10/02 04:00 | 14 | [198] Seongchan Hong v Ergi Kirkin [328] | 7-5,6-3 | |
| Davis Cup | 09/17 12:45 | 1 | [75] Bernabe Zapata Miralles v Seongchan Hong [194] | 6-4,7-5 | |
| Davis Cup | 09/14 13:00 | 1 | [119] Tomas Machac v Seongchan Hong [194] | 7-6,4-6,6-2 | |
| Davis Cup | 09/12 13:00 | 1 | [52] Dusan Lajovic v Seongchan Hong [194] | 6-4,7-6 | |
| Challenger Istanbul | 09/04 07:00 | 19 | Seongchan Hong v Yshai Oliel | 4-6,1-6 | |
| Challenger Istanbul | 09/03 08:35 | 14 | Seongchan Hong v Cengiz Aksu | 6-2,6-4 | |
| US Open | 08/24 14:00 | 15 | [95] Taro Daniel v Seongchan Hong [203] | 6-2,4-6,6-1 | |
| US Open | 08/22 15:00 | 14 | [173] Francesco Passaro v Seongchan Hong [203] | 6-7,4-6 | |
| Challenger Stanford | 08/14 05:00 | 25 | Alex Michelsen v Seongchan Hong | 4-6,6-2,6-0 | |
| Challenger Cary | 08/10 21:45 | 26 | [206] Seong Chan Hong v Patrick Kypson [297] | 4-6,4-6 | |
| Challenger Cary | 08/08 21:45 | 25 | [93] Alexander Shevchenko v Seong Chan Hong [206] | 6-3,3-6,6-7 | |
| Challenger Lexington | 08/04 17:00 | 27 | [218] Tennys Sandgren v Seong Chan Hong [209] | 6-4,6-2 |
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.