stadio: Court F Round: 25 Ground: Hardcourt indoor
| Challenger Gimcheon | 2017/05/02 05:55 | Tatsuma Ito v Duckhee Lee | 6-4,3-6,4-6 |
| Challenger Shenzhen | 2017/03/14 06:00 | Duckhee Lee v Tatsuma Ito | 6-1,5-7,6-4 |
| Challenger Kaohsiung | 2015/09/21 07:40 | Tatsuma Ito v Duckhee Lee | 4-6,7-6,6-3 |
| Challenger Shenzhen 2 | 2017/11/02 03:30 | Austin Krajicek v Duckhee Lee | 7-5,3-6,6-3 |
| Challenger Shenzhen 2 | 2017/10/31 05:00 | Naoki Nakagawa v Duckhee Lee | 1-6,4-6 |
| Challenger Suzhou | 2017/10/24 05:40 | Duckhee Lee v Hubert Hurkacz | 6-4,4-6,6-7 |
| Challenger Ningbo | 2017/10/18 04:30 | Zhe Li v Duckhee Lee | 6-2,6-4 |
| Challenger Ningbo | 2017/10/16 04:05 | Duckhee Lee v Taylor Fritz | 6-3,3-6,6-3 |
| Challenger Kaohsiung | 2017/10/03 10:00 | Jason Jung v Duckhee Lee | 3-6,6-2,7-6 |
| Challenger Gwangju | 2017/09/22 02:00 | Duckhee Lee v Matthias Bachinger | 3-6,5-7 |
| Challenger Gwangju | 2017/09/21 02:00 | Duckhee Lee v Alessandro Bega | 6-4,6-3 |
| Challenger Ningbo | 2017/10/18 03:00 | Yen-Hsun Lu v Tatsuma Ito | 6-2,6-3 |
| Challenger Ningbo | 2017/10/16 06:10 | Rigele Te v Tatsuma Ito | 3-6,5-7 |
| ATP Tokyo - Qual. | 2017/09/30 04:40 | Tatsuma Ito v Stefanos Tsitsipas | 6-4,6-7,2-6 |
| Challenger Gwangju | 2017/09/23 01:50 | Tatsuma Ito v Matthias Bachinger | 6-7,3-6 |
| Challenger Gwangju | 2017/09/22 02:00 | Steven Diez v Tatsuma Ito | 2-6,4-6 |
| Challenger Gwangju | 2017/09/20 01:30 | Bradley Klahn v Tatsuma Ito | 5-7,6-1,3-6 |
| Challenger Gwangju | 2017/09/18 01:30 | Marc Polmans v Tatsuma Ito | 1-6,1-6 |
| Challenger Shanghai | 2017/09/13 04:20 | Omar Jasika v Tatsuma Ito | 4-6,6-3,7-5 |