| Challenger de Stanford | 08/14 05:00 | 25 | Alex Michelsen v Seongchan Hong | 4-6,6-2,6-0 | |
| Challenger de Cary | 08/10 21:45 | 26 | [206] Seong Chan Hong v Patrick Kypson [297] | 4-6,4-6 | |
| Challenger de Cary | 08/08 21:45 | 25 | [93] Alexander Shevchenko v Seong Chan Hong [206] | 6-3,3-6,6-7 | |
| Challenger de Lexington | 08/04 17:00 | 27 | [218] Tennys Sandgren v Seong Chan Hong [209] | 6-4,6-2 | |
| Challenger de Lexington | 08/02 17:30 | 26 | [333] Bernard Tomic v Seong Chan Hong [209] | 1-6,2-6 | |
| Challenger de Lexington | 07/31 20:00 | 25 | [320] Nam Hoang Ly v Seong Chan Hong [209] | 1-6,5-7 | |
| Wimbledon | 06/26 10:00 | 14 | [115] Yosuke Watanuki v Seong Chan Hong [197] | 7-6,7-6 | |
| Challenger de Ilkley | 06/17 10:00 | 14 | [160] Dennis Novak v Seong Chan Hong [190] | 6-4,3-6,6-3 | |
| Challenger de Nottingham | 06/13 10:00 | 25 | [190] Seong Chan Hong v Bu Yunchaokete [165] | 6-7,2-6 | |
| Challenger de Surbiton | 06/04 10:00 | 14 | [184] Seong Chan Hong v Jay Clarke [432] | 3-6,3-6 | |
| Challenger de Troisdorf | 05/31 11:00 | 26 | [261] Renzo Olivo v Seong Chan Hong [184] | 6-3,3-6,6-4 | |
| Challenger de Troisdorf | 05/29 15:30 | 25 | [184] Seong Chan Hong v Zsombor Piros [125] | 3-6,6-0,6-0 | |
| Open de Francia | 05/22 08:00 | 14 | [184] Seong-Chen Hong v Matteo Gigante [204] | 5-7,4-6 | |
| Challenger de Busan | 05/09 03:30 | 25 | [319] Jason Jung v Seong Chan Hong [184] | Retired | |
| Challenger de Seúl | 04/28 02:00 | 27 | [194] Seong Chan Hong v Bu Yunchaokete [242] | 4-6,4-6 | |
| Challenger de Seúl | 04/27 02:00 | 26 | [89] Max Purcell v Seong Chan Hong [194] | 1-6,3-6 | |
| Challenger de Seúl | 04/26 04:55 | 25 | Seong Chan Hong v Tatsuma Ito | 6-3,6-2 | |
| Challenger de Tallahassee | 04/22 16:00 | 28 | [156] Zizou Bergs v Seong Chan Hong [200] | 6-2,6-1 | |
| Challenger de Tallahassee | 04/21 15:00 | 27 | [326] Moez Echargui v Seong Chan Hong [200] | 4-6,6-2,1-6 | |
| Challenger de Tallahassee | 04/19 18:15 | 26 | [200] Seong Chan Hong v Rio Noguchi [204] | 6-1,6-4 | |
| Challenger de Tallahassee | 04/17 20:00 | 25 | [472] Christian Harrison v Seong Chan Hong [200] | 3-6,1-6 | |
| Challenger de Sarasota | 04/13 17:05 | 26 | [70] Jason Kubler v Seong Chan Hong [209] | 6-3,6-4 | |
| Challenger de Sarasota | 04/12 18:30 | 25 | [209] Seong Chan Hong v Zachary Svajda [226] | 6-0,6-0 | |
| ATP Houston | 04/01 21:10 | 14 | [207] Seong Chan Hong v Facundo D Acosta [163] | 2-6,3-6 | |
| Challenger de Ciudad de México | 03/27 22:45 | 25 | [162] Alejandro Tabilo v Seong Chan Hong [207] | 7-5,6-3 | |
| Challenger de Puerto Vallarta | 03/08 00:20 | 25 | [327] Ulises Blanch v Seong Chan Hong [207] | 6-3,6-3 | |
| Challenger de Waco | 03/03 17:00 | 27 | [214] Seong-Chen Hong v Alexandre Muller [146] | 7-6,6-7,2-6 | |
| Challenger de Waco | 03/01 16:30 | 26 | [214] Seong-Chen Hong v Nicolas Mejia [247] | 7-5,6-1 | |
| Challenger de Waco | 02/28 16:00 | 25 | [150] Mattia Bellucci v Seong-Chen Hong [214] | 4-6,1-6 | |
| Challenger de Rome GA | 02/25 17:10 | 28 | [235] Seong Chan Hong v Alex Michelsen [466] | 6-4,5-7,1-6 |
Wikipedia - Hong Seong-chan
- Este es un nombre coreano; el apellido es Hong.
Seong-chan Hong (Gangwon, 30 de junio de 1997) es un tenista profesional surcoreano.