Michal Ciszek defeated Dustin Brown 6-3 6-3 in the Jamaica F6 round of 32 on hard. The upset overturned the form book — Dustin Brown came in leading the head-to-head 1–0. Michal Ciszek claimed a first win over Dustin Brown in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-06-23 | Canada F3 | R32 | hard | Dustin Brown | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.