Yaoki Ishii defeated Tasuku Iwami 7-5 6-2 in the Japan 2 Masters 2 round of 16 on hard. The upset overturned the form book — Tasuku Iwami came in leading the head-to-head 3–2, but Yaoki Ishii had been the form player, winning 2 of their last 4 on hard. Yaoki Ishii narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-03-29 | Japan F3 | R32 | hard | Tasuku Iwami | 6-2 6-3 |
| 2009-06-22 | Japan F6 | QF | carpet | Yaoki Ishii | 7-6(3) 3-6 6-3 |
| 2005-09-05 | Japan F10 | R32 | hard | Tasuku Iwami | 6-2 6-3 |
| 2005-04-25 | Japan F3 | R16 | carpet | Yaoki Ishii | 7-5 6-1 |
| 2005-04-18 | Japan F2 | R16 | clay | Tasuku Iwami | 6-2 6-2 |
Averages over each player's completed matches in the selected window (4 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