Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| Challenger Gwangju | 2019/05/13 02:00 | Tsung-Hua Yang v Jung-Woong Na | 6-3,7-6 |
| Challenger Busan | 2019/05/09 03:00 | Akira Santillan v Tsung-Hua Yang | 7-6,6-1 |
| Challenger Busan | 2019/05/08 05:05 | Tsung-Hua Yang v Soonwoo Kwon | 6-3,7-6 |
| Challenger Busan | 2019/05/06 06:50 | Tsung-Hua Yang v Kevin King | 6-3,6-4 |
| Challenger Seoul | 2019/05/01 04:05 | Alex Bolt v Tsung-Hua Yang | 7-6,6-7,6-3 |
| Challenger Seoul | 2019/04/29 05:40 | Go Soeda v Tsung-Hua Yang | 6-2,4-6,4-6 |
| Challenger Anning | 2019/04/16 06:05 | Maxime Janvier v Tsung-Hua Yang | 6-7,7-5,7-6 |
| Challenger Anning | 2019/04/15 06:35 | Kaichi Uchida v Tsung-Hua Yang | 7-6,3-6,1-6 |
| Challenger Busan | 2019/05/08 03:00 | Kaichi Uchida v Sergiy Stakhovsky | 7-6,6-3 |
| Challenger Seoul | 2019/05/02 04:55 | Nikola Milojevic v Sergiy Stakhovsky | 6-2,7-6 |
| Challenger Seoul | 2019/04/30 05:30 | Rio Noguchi v Sergiy Stakhovsky | 1-6,4-6 |
| ATP Budapest | 2019/04/22 15:50 | Radu Albot v Sergiy Stakhovsky | 7-5,6-4 |
| ATP Budapest | 2019/04/21 09:00 | Miomir Kecmanovic v Sergiy Stakhovsky | 6-4,6-4 |
| ATP Budapest | 2019/04/20 08:30 | Daniel Brands v Sergiy Stakhovsky | 5-7,1-6 |
| Challenger Taipei | 2019/04/14 07:30 | Dennis Novak v Sergiy Stakhovsky | 6-2,6-4 |
| Challenger Taipei | 2019/04/13 06:30 | Sergiy Stakhovsky v Go Soeda | 7-6,7-6 |