| Coupe Davis | 09/12 13:00 | 1 | [52] Dusan Lajovic v Seongchan Hong [194] | 6-4,7-6 | |
| Istanbul, Turkey | 09/04 07:00 | 19 | Seongchan Hong v Yshai Oliel | 4-6,1-6 | |
| Istanbul, Turkey | 09/03 08:35 | 14 | Seongchan Hong v Cengiz Aksu | 6-2,6-4 | |
| US Open, New York, USA | 08/24 14:00 | 15 | [95] Taro Daniel v Seongchan Hong [203] | 6-2,4-6,6-1 | |
| US Open, New York, USA | 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] Hong, Seong Chan v Patrick Kypson [297] | 4-6,4-6 | |
| Challenger Cary | 08/08 21:45 | 25 | [93] Alexander Shevchenko v Hong, Seong Chan [206] | 6-3,3-6,6-7 | |
| Challenger Lexington | 08/04 17:00 | 27 | [218] Tennys Sandgren v Hong, Seong Chan [209] | 6-4,6-2 | |
| Challenger Lexington | 08/02 17:30 | 26 | [333] Bernard Tomic v Hong, Seong Chan [209] | 1-6,2-6 | |
| Challenger Lexington | 07/31 20:00 | 25 | [320] Nam Hoang Ly v Hong, Seong Chan [209] | 1-6,5-7 | |
| Wimbledon, London, Great Britain | 06/26 10:00 | 14 | [115] Yosuke Watanuki v Hong, Seong Chan [197] | 7-6,7-6 | |
| Ilkley, Great Britain | 06/17 10:00 | 14 | [160] Dennis Novak v Hong, Seong Chan [190] | 6-4,3-6,6-3 | |
| Challenger - Nottingham | 06/13 10:00 | 25 | [190] Hong, Seong Chan v Bu Yunchaokete [165] | 6-7,2-6 | |
| Challenger - Surbiton | 06/04 10:00 | 14 | [184] Hong, Seong Chan v Jay Clarke [432] | 3-6,3-6 | |
| Troisdorf, Germany | 05/31 11:00 | 26 | [261] Renzo Olivo v Hong, Seong Chan [184] | 6-3,3-6,6-4 | |
| Troisdorf, Germany | 05/29 15:30 | 25 | [184] Hong, Seong Chan v Zsombor Piros [125] | 3-6,6-0,6-0 | |
| Open de France | 05/22 08:00 | 14 | [184] Hong, Seong Chan v Matteo Gigante [204] | 5-7,4-6 | |
| Challenger - Busan | 05/09 03:30 | 25 | [319] Jason Jung v Hong, Seong Chan [184] | Retired | |
| Challenger Seoul | 04/28 02:00 | 27 | [194] Hong, Seong Chan v Bu Yunchaokete [242] | 4-6,4-6 | |
| Challenger Seoul | 04/27 02:00 | 26 | [89] Max Purcell v Hong, Seong Chan [194] | 1-6,3-6 | |
| Challenger Seoul | 04/26 04:55 | 25 | Hong, Seong Chan v Tatsuma Ito | 6-3,6-2 | |
| Challenger - Tallahassee | 04/22 16:00 | 28 | [156] Zizou Bergs v Hong, Seong Chan [200] | 6-2,6-1 | |
| Challenger - Tallahassee | 04/21 15:00 | 27 | [326] Moez Echargui v Hong, Seong Chan [200] | 4-6,6-2,1-6 | |
| Challenger - Tallahassee | 04/19 18:15 | 26 | [200] Hong, Seong Chan v Rio Noguchi [204] | 6-1,6-4 | |
| Challenger - Tallahassee | 04/17 20:00 | 25 | [472] Christian Harrison v Hong, Seong Chan [200] | 3-6,1-6 | |
| Challenger - Sarasota | 04/13 17:05 | 26 | [70] Jason Kubler v Hong, Seong Chan [209] | 6-3,6-4 | |
| Challenger - Sarasota | 04/12 18:30 | 25 | [209] Hong, Seong Chan v Zachary Svajda [226] | 6-0,6-0 | |
| ATP - Houston | 04/01 21:10 | 14 | [207] Hong, Seong Chan v Diaz Acosta, Facundo [163] | 2-6,3-6 | |
| Challenger - Mexique | 03/27 22:45 | 25 | [162] Alejandro Tabilo v Hong, Seong Chan [207] | 7-5,6-3 |
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. 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.