Clinton Marsh defeated Grant Stafford 6-4 6-4 in the USA 3 Masters 4 final on hard. The upset overturned the form book — Grant Stafford came in leading the head-to-head 1–0. Clinton Marsh claimed a first win over Grant Stafford in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-04-29 | USA 2 Masters 4 | R32 | hard | Grant Stafford | 2-6 6-0 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.