Emil Reinberg defeated Seita Watanabe 7-6 7-5 in the M15 Monastir 20 qualifying round of 32 on hard. The upset overturned the form book — Seita Watanabe came in leading the head-to-head 1–0, but Emil Reinberg had been the form player, winning 2 of their last 5 on hard. Emil Reinberg claimed a first win over Seita Watanabe in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-10-07 | M15 Cancun 3 | R16 | hard | Seita Watanabe | 4-6 6-3 6-4 |
Averages over each player's completed matches in the selected window (52 vs 111). 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