Gleb Sakharov defeated Yannick Mertens 4-6 6-4 6-4 in the Quimper CH qualifying round 2 on hard. The upset overturned the form book — Yannick Mertens came in leading the head-to-head 2–1, but Gleb Sakharov had been the form player, winning 3 of their last 9 on hard. Gleb Sakharov narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-07-24 | Gstaad | Q1 | clay | Gleb Sakharov | 6-4 7-5 |
| 2016-02-29 | France F4 | R32 | hard | Yannick Mertens | 7-6(5) 6-3 |
| 2010-10-18 | France F19 | QF | hard | Yannick Mertens | 6-2 6-0 |
Averages over each player's completed matches in the selected window (175 vs 183). 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