Hyeon Chung defeated Donald Young 7-6 6-1 in the Acapulco round of 32 on hard. The upset overturned the form book — Donald Young came in ranked #552, defending last year's round of 16, but Hyeon Chung had been the form player, winning 6 of their last 10 on hard. Hyeon Chung extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-05-22 | Lyon | R32 | clay | Hyeon Chung | 6-2 6-3 |
Averages over each player's completed matches in the selected window (169 vs 139). 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