Colin Sinclair defeated G. J. Kim 7-5 6-2 in the M15 Anseong 1 round of 32 on clay. Colin Sinclair extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-06-12 | M15 Harmon 1 | R16 | hard | Colin Sinclair | 6-4 6-0 |
| 2022-06-07 | M25 Harmon 2 | R32 | hard | G. J. Kim | 7-6(1) 6-3 |