Daniel Koellerer defeated Philipp Mullner 7-6 6-2 in the Jamaica F18 qualifying round on clay. The result followed the form book — Daniel Koellerer came in leading the head-to-head 2–1. Daniel Koellerer extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-07-14 | Austria F2 | SF | clay | Daniel Koellerer | 6-3 6-0 |
| 2003-07-07 | Austria F1 | F | clay | Daniel Koellerer | 6-1 6-3 |
| 2002-10-21 | Jamaica F17 | R32 | hard | Philipp Mullner | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.