Woong Sun Jun advanced when Yuichi Ito retired 6-7 7-6 in the Japan F5 round of 16. Woong Sun Jun claimed a first win over Yuichi Ito in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-09-27 | Tokyo | Q32 | hard | Yuichi Ito | 4-6 7-6(4) 6-3 |
Averages over each player's completed matches in the selected window (6 vs 65). 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