Daniel Koellerer advanced when Alexander Flock retired 6-1 2-1 in the Austria F1 round of 16. Daniel Koellerer extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-09-04 | Netherlands F6 | R16 | clay | Daniel Koellerer | 6-1 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.