Royce Deppe defeated Robbie Koenig 6-3 7-6 in the USA 2 Masters 3 round of 16 on hard. The upset overturned the form book — Robbie Koenig came in leading the head-to-head 1–0. Royce Deppe claimed a first win over Robbie Koenig in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-06-03 | USA 3 Masters 1 | R16 | hard | Robbie Koenig | 7-6 4-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.