Frederik Nielsen defeated Martijn Van Haasteren 6-2 5-7 7-5 in the Denmark F1 round of 32 on clay. The result followed the form book — Frederik Nielsen came in leading the head-to-head 1–0. Frederik Nielsen extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-09-13 | Sweden F1 | SF | hard | Frederik Nielsen | 6-3 3-6 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.