Oh Hee Kwon defeated Tasuku Iwami 6-0 1-6 7-6 in the Japan 1 Masters 1 qualifying round on hard. The upset overturned the form book — Tasuku Iwami came in leading the head-to-head 2–1, but Oh Hee Kwon had been the form player, winning 3 of their last 4 on hard. Oh Hee Kwon narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-06-23 | Japan F6 | R32 | carpet | Tasuku Iwami | 6-4 6-1 |
| 2008-05-19 | Korea Rep F4 | R32 | hard | Tasuku Iwami | 6-1 6-2 |
| 2005-07-25 | China F5 | SF | hard | Oh Hee Kwon | 6-3 5-2 |
Averages over each player's completed matches in the selected window (17 vs 4). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About