Arata Onozawa defeated Sho Katayama 7-5 6-4 in the Japan F3 round of 32 on hard. The upset overturned the form book — Sho Katayama came in leading the head-to-head 3–1. Arata Onozawa narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-03-11 | Japan F1 | R32 | hard | Arata Onozawa | 6-4 6-3 |
| 2012-10-15 | Japan F9 | R32 | hard | Sho Katayama | 6-3 6-3 |
| 2012-10-08 | Japan F8 | R32 | hard | Sho Katayama | 6-4 6-3 |
| 2012-03-19 | Japan F2 | R16 | hard | Sho Katayama | 6-4 6-4 |
Averages over each player's completed matches in the selected window (13 vs 17). 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