Young Jun Kim defeated Kyu Tae Im 6-4 7-5 in the Japan F4 qualifying round on hard. The result followed the form book — Young Jun Kim came in leading the head-to-head 2–1. Young Jun Kim extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-30 | Korea F3 | QF | hard | Kyu Tae Im | 2-6 6-4 6-4 |
| 2008-06-16 | Japan F5 | R32 | carpet | Young Jun Kim | 6-4 3-6 7-5 |
| 2003-05-05 | Korea Rep F2 | SF | clay | Young Jun Kim | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.