Warren Brooks defeated Chuck Swayne 7-6 6-3 in the Central America Masters 4 round of 32 on hard. The upset overturned the form book — Chuck Swayne came in leading the head-to-head 1–0. Warren Brooks claimed a first win over Chuck Swayne in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-04-29 | USA 2 Masters 1 | R64 | hard | Chuck Swayne | 6-2 6-1 |