Tadayuki Longhi defeated Hiromasa Oku 6-4 6-1 in the Japan F1 qualifying round of 16 on hard. The upset overturned the form book — Hiromasa Oku came in leading the head-to-head 2–0, but Tadayuki Longhi had been the form player, winning 2 of their last 4 on hard. Tadayuki Longhi claimed a first win over Hiromasa Oku in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-06-01 | Japan F5 | R16 | clay | Hiromasa Oku | 6-3 6-0 |
| 2013-06-24 | Japan F7 | R32 | clay | Hiromasa Oku | 6-2 6-3 |
Averages over each player's completed matches in the selected window (2 vs 19). ATP, WTA & Challenger.
wins 59% of points on serve vs Oku H.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About