Marc Sieber defeated Stefan Seifert 3-6 6-3 6-3 in the Germany F13 round of 32 on clay. Marc Sieber extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-08-06 | Germany F12 | R32 | clay | Marc Sieber | 6-1 6-2 |
| 2007-06-18 | Germany F6 | R16 | clay | Stefan Seifert | 6-2 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.