Jae Min Seol defeated Makoto Ochi 6-3 2-6 6-4 in the Korea F4 round of 16 on hard. The upset overturned the form book — Makoto Ochi came in leading the head-to-head 2–0. Jae Min Seol claimed a first win over Makoto Ochi in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-06-05 | Korea F2 | R32 | hard | Makoto Ochi | 6-4 7-5 |
| 2015-08-10 | Korea F3 | QF | hard | Makoto Ochi | 6-0 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.