Marc Sieber defeated Matthias Kolbe 6-3 6-4 in the Germany F14 qualifying round on clay. The result followed the form book — Marc Sieber came in leading the head-to-head 1–0. Marc Sieber extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-08-18 | Germany F16 | R32 | clay | Marc Sieber | 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.