Nikolaus Moser defeated Tihomir Grozdanov 6-3 7-6 in the Vienna q32 on hard. The upset overturned the form book — Tihomir Grozdanov came in leading the head-to-head 1–0. Nikolaus Moser claimed a first win over Tihomir Grozdanov in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-03-11 | Croatia F4 | R32 | clay | Tihomir Grozdanov | 7-5 3-6 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.