Stuart Parker defeated Yannick Mertens 6-3 4-6 7-6 in the M15 Monastir 3 final on hard. The upset overturned the form book — Yannick Mertens came in leading the head-to-head 2–0, but Stuart Parker had been the form player, winning 6 of their last 10 on hard. Stuart Parker claimed a first win over Yannick Mertens in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-02-10 | M15 Monastir 4 | R32 | hard | Yannick Mertens | 5-7 6-4 6-3 |
| 2019-08-22 | M15 Sintra 2 | R16 | hard | Yannick Mertens | 4-6 6-3 6-2 |
Averages over each player's completed matches in the selected window (200 vs 62). 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