Jeroen Masson defeated Andrew Derer 6-4 6-2 in the Great Britain F6 round of 16 on hard. The upset overturned the form book — Andrew Derer came in leading the head-to-head 1–0, but Jeroen Masson had been the form player, winning 2 of their last 4 on hard. Jeroen Masson claimed a first win over Andrew Derer in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-06-21 | France F9 | R16 | clay | Andrew Derer | 6-3 6-4 |