Takuto Niki defeated Kazuma Kawachi 3-6 6-1 6-1 in the M25 Sapporo 2 round of 32 on hard. Takuto Niki extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-05-30 | M15 Singapore 1 | R16 | hard | Kazuma Kawachi | 6-2 2-1 |
| 2014-06-09 | Japan F6 | R32 | hard | Takuto Niki | 6-2 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.