Stefan Koubek defeated Christopher Kas 6-2 6-3 in the GER vs AUT round robin on hard. The result followed the form book — Stefan Koubek came in leading the head-to-head 1–0. Stefan Koubek extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-01-30 | Zagreb | Q16 | hard | Stefan Koubek | 6-1 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.