Stadium: Court 1 Round: 27 Ground: Hardcourt outdoor
| Challenger San Francisco | 2017/02/10 22:00 | Tatsuma Ito v Ze Zhang | 2-6,3-6 |
| Challenger Busan | 2018/05/15 02:00 | Tatsuma Ito v Yasutaka Uchiyama | 2-6,7-6,6-4 |
| Challenger Gimcheon | 2018/05/08 06:15 | Jason Jung v Tatsuma Ito | 6-3,5-7,7-6 |
| Challenger Seoul | 2018/05/05 07:15 | Mackenzie McDonald v Tatsuma Ito | 6-4,7-6 |
| Challenger Seoul | 2018/05/04 05:00 | Tatsuma Ito v Di Wu | 7-5,3-6,6-2 |
| Challenger Seoul | 2018/05/03 01:30 | Tatsuma Ito v Seong Chan Hong | 7-5,6-1 |
| Challenger Seoul | 2018/05/01 07:05 | Tatsuma Ito v Duckhee Lee | 6-1,6-3 |
| Challenger Nanchang | 2018/04/17 03:00 | Yunseong Chung v Tatsuma Ito | 6-4,7-6 |
| Challenger Taipei | 2018/04/14 06:55 | Tatsuma Ito v Yuki Bhambri | 6-3,3-6,4-6 |
| Challenger Busan | 2018/05/18 03:15 | Yosuke Watanuki v Ze Zhang | 4-6,6-4,6-1 |
| Challenger Busan | 2018/05/17 02:00 | Ze Zhang v Yuki Bhambri | 6-4,6-3 |
| Challenger Busan | 2018/05/15 07:10 | Ze Zhang v Dayne Kelly | 6-1,6-4 |
| Challenger Gimcheon | 2018/05/08 02:00 | Mackenzie McDonald v Ze Zhang | 7-6,7-6 |
| Challenger Seoul | 2018/05/01 06:50 | Jason Kubler v Ze Zhang | 6-1,6-1 |
| Challenger Anning | 2018/04/24 04:25 | Calvin Hemery v Ze Zhang | 7-6,6-3 |
| Challenger Nanchang | 2018/04/16 06:05 | Mukund Sasikumar v Ze Zhang | 6-4,6-4 |
| Davis Cup | 2018/04/06 04:00 | Ze Zhang v Sumit Nagal | 6-4,6-1 |