Peng Sun defeated Yuichi Ito 6-2 6-3 in the Japan F8 qualifying round on hard. The upset overturned the form book — Yuichi Ito came in leading the head-to-head 2–1, but Peng Sun had been the form player, winning 3 of their last 9 on hard. Peng Sun narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-09-21 | Australia F6 | R16 | hard | Yuichi Ito | 6-3 6-3 |
| 2009-08-03 | China F5 | QF | hard | Yuichi Ito | 6-2 7-6(4) |
| 2009-01-12 | China F2 | R32 | hard | Peng Sun | 6-7(5) 6-2 6-4 |
Averages over each player's completed matches in the selected window (3 vs 66). 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