Hyeon Chung defeated Quentin Halys 6-4 7-5 in the Lyon qualifying round 2 on clay. The upset overturned the form book — Quentin Halys came in ranked #90. Hyeon Chung extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-05-22 | Lyon | Q2 | clay | Hyeon Chung | 6-4 7-5 |
| 2016-05-23 | Roland Garros | R128 | clay | Quentin Halys | 6-1 6-4 6-4 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (195 vs 200). ATP, WTA & Challenger.