Tasuku Iwami defeated Young Jun Kim 3-6 7-6 6-0 in the Korea Rep F3 qualifying round on hard. The upset overturned the form book — Young Jun Kim came in leading the head-to-head 3–0. Tasuku Iwami claimed a first win over Young Jun Kim in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-06-09 | Japan F4 | QF | clay | Young Jun Kim | 4-6 6-2 7-5 |
| 2008-05-12 | Korea Rep F3 | R32 | hard | Young Jun Kim | 6-4 6-4 |
| 2004-05-24 | Japan F4 | SF | hard | Young Jun Kim | 4-6 6-1 7-6(6) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.