Jonathan Chang defeated Dominik Koepfer 6-7 6-2 7-5 in the USA F24 round of 16 on hard. The upset overturned the form book — Dominik Koepfer came in leading the head-to-head 1–0. Jonathan Chang claimed a first win over Dominik Koepfer in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-06-20 | USA F21 | Q16 | hard | Dominik Koepfer | 7-5 6-2 |
Averages over each player's completed matches in the selected window (18 vs 200). 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