Ryota Tanuma defeated Tatsuma Ito 6-4 6-1 in the M25 Sapporo 1 quarter-final on hard. The upset overturned the form book — Tatsuma Ito came in leading the head-to-head 2–0. Ryota Tanuma claimed a first win over Tatsuma Ito in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-03-19 | Japan F3 | QF | hard | Tatsuma Ito | 6-7(4) 6-2 6-1 |
| 2017-04-03 | Japan F5 | R16 | hard | Tatsuma Ito | 6-2 6-4 |
Averages over each player's completed matches in the selected window (4 vs 21). 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