Yuuya Kibi defeated Woong Sun Jun 6-2 6-7 6-2 in the Japan F4 round of 16 on hard. The upset overturned the form book — Woong Sun Jun came in leading the head-to-head 1–0, but Yuuya Kibi had been the form player, winning 2 of their last 6 on hard. Yuuya Kibi claimed a first win over Woong Sun Jun in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-03-26 | Japan F2 | R32 | hard | Woong Sun Jun | 7-5 4-6 6-1 |
Averages over each player's completed matches in the selected window (145 vs 6). 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