Marc Sieber defeated Max Raditschnigg 7-6 7-6 in the Croatia F10 round of 16 on clay. The upset overturned the form book — Max Raditschnigg came in leading the head-to-head 2–0, but Marc Sieber had been the form player, winning 3 of their last 5 on clay. Marc Sieber claimed a first win over Max Raditschnigg in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-08-29 | Austria F8 | F | clay | Max Raditschnigg | 6-3 6-4 |
| 2008-06-16 | Italy F18 | QF | clay | Max Raditschnigg | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.