Marc Sieber defeated Attila Balazs 6-3 4-6 6-1 in the Croatia F11 round of 16 on clay. The upset overturned the form book — Attila Balazs 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 Attila Balazs in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-03-04 | Croatia F3 | SF | clay | Attila Balazs | 6-1 6-3 |
| 2011-06-27 | Germany F7 | R16 | clay | Attila Balazs | 6-3 6-4 |
Averages over each player's completed matches in the selected window (141 vs 200). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About