Hiromasa Oku advanced when Hsien Yin Peng retired 7-5 1-6 6-6 in the Japan F5 round of 16. Hiromasa Oku extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-10-13 | Japan F10 | R32 | hard | Hiromasa Oku | 6-2 6-3 |
Averages over each player's completed matches in the selected window (19 vs 20). 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