Stadium: Center Round: 25 Ground: Hardcourt outdoor
| Challenger Bangkok | 2018/01/01 06:15 | Duckhee Lee v Tsung-Hua Yang | 7-5,6-4 |
| Challenger Tashkent | 2018/10/08 14:10 | Evgeny Karlovskiy v Duckhee Lee | 7-6,6-4 |
| Challenger Kaohsiung | 2018/09/22 08:10 | Gael Monfils v Duckhee Lee | 6-1,6-1 |
| Challenger Kaohsiung | 2018/09/21 12:05 | Duckhee Lee v Frederico Ferreira Silva | 6-2,7-5 |
| Challenger Kaohsiung | 2018/09/20 10:00 | Jason Jung v Duckhee Lee | 6-7,4-6 |
| Challenger Kaohsiung | 2018/09/19 08:50 | Tomislav Brkic v Duckhee Lee | 2-6,6-7 |
| Davis Cup | 2018/09/15 03:35 | Duckhee Lee v Rubin Statham | 6-4,6-1 |
| Davis Cup | 2018/09/14 04:05 | Duckhee Lee v Michael Venus | 7-5,6-7,6-2 |
| Challenger Zhangjiagang | 2018/09/06 04:20 | Uladzimir Ignatik v Duckhee Lee | 7-6,6-1 |
| Challenger Ningbo | 2018/10/15 05:50 | Tsung-Hua Yang v Alejandro Davidovich Fokina | 3-6,5-7 |
| Challenger Tashkent | 2018/10/08 12:15 | Alexander Bublik v Tsung-Hua Yang | 3-6,6-3,6-4 |
| Challenger Almaty 2 | 2018/10/03 05:50 | Tsung-Hua Yang v Lukas Rosol | 6-7,6-3,2-6 |
| Challenger Almaty 2 | 2018/10/02 08:50 | Tsung-Hua Yang v Teymuraz Gabashvili | 7-6,6-4 |
| Challenger Kaohsiung | 2018/09/19 07:50 | Tsung-Hua Yang v Brayden Schnur | 5-7,3-6 |
| Challenger Kaohsiung | 2018/09/18 07:15 | Hiroki Moriya v Tsung-Hua Yang | 4-6,3-6 |
| Challenger Shanghai | 2018/09/11 03:00 | Hiroki Moriya v Tsung-Hua Yang | 4-6,6-3,6-2 |
| Challenger Jinan | 2018/08/09 07:30 | Alexei Popyrin v Tsung-Hua Yang | 4-6,7-6,7-5 |