Sho Katayama defeated Akihiro Tanaka 6-3 6-1 in the Japan F7 round of 32 on carpet. The upset overturned the form book — Akihiro Tanaka came in leading the head-to-head 1–0. Sho Katayama claimed a first win over Akihiro Tanaka in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-06-01 | Japan F5 | R32 | clay | Akihiro Tanaka | 6-4 0-6 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.