Michael Lammer defeated Bart De Gier 6-2 6-4 in the Switzerland 1 3 round of 32 on carpet. Michael Lammer extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-02-10 | Switzerland 1 2 | R16 | carpet | Bart De Gier | 6-3 6-3 |
| 2003-02-10 | Switzerland 1 4 | QF | carpet | Michael Lammer | 7-6(7) 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.