Jules Okala defeated Yannick Mertens 2-6 7-5 6-4 in the France F24 round of 32 on hard. The upset overturned the form book — Yannick Mertens came in leading the head-to-head 1–0, but Jules Okala had been the form player, winning 3 of their last 8 on hard. Jules Okala claimed a first win over Yannick Mertens in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-10-30 | Israel F15 | QF | hard | Yannick Mertens | 7-5 6-0 |
Averages over each player's completed matches in the selected window (112 vs 184). 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