Tihomir Grozdanov defeated Nikolaus Moser 7-5 3-6 6-3 in the Croatia F4 round of 32 on clay. The upset overturned the form book — Nikolaus Moser came in leading the head-to-head 1–0, but Tihomir Grozdanov had been the form player, winning 5 of their last 6 on clay. Tihomir Grozdanov claimed a first win over Nikolaus Moser in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-10-12 | Vienna | Q32 | hard | Nikolaus Moser | 6-3 7-6(4) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.