Ji Hoon Son defeated Sang Oh Oh 7-5 6-4 in the Korea F4 round of 32 on hard. The result followed the form book — Ji Hoon Son came in leading the head-to-head 1–0. Ji Hoon Son extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-05-06 | Korea F2 | R16 | hard | Ji Hoon Son | 4-6 7-5 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.