Dominik Koepfer defeated Rhyne Williams 2-6 6-0 6-1 in the USA F9 round of 16 on clay. The upset overturned the form book — Rhyne Williams came in leading the head-to-head 2–1. Dominik Koepfer narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-10-10 | USA F31 | R32 | hard | Dominik Koepfer | 3-6 7-6(4) 6-2 |
| 2016-08-08 | USA F27 | QF | hard | Rhyne Williams | 6-2 6-4 |
| 2016-06-13 | USA F18 | R32 | hard | Rhyne Williams | 6-3 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.