Soichiro Moritani defeated Daisuke Sumizawa 6-2 4-6 7-6 in the M15 Karuizawa 1 round of 16 on clay. The result followed the form book — Soichiro Moritani came in leading the head-to-head 1–0. Soichiro Moritani extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2020-01-26 | M25 Nonthaburi 1 | Q64 | hard | Soichiro Moritani | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.