Grant Stafford defeated Clinton Marsh 2-6 6-0 6-4 in the USA 2 Masters 4 round of 32 on hard. The upset overturned the form book — Clinton Marsh came in leading the head-to-head 1–0. Grant Stafford claimed a first win over Clinton Marsh in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-06-03 | USA 3 Masters 4 | F | hard | Clinton Marsh | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.