Mario Haider Maurer defeated Nikolaus Moser 7-5 6-3 in the Austria F9 round of 32 on clay. The upset overturned the form book — Nikolaus Moser came in leading the head-to-head 1–0. Mario Haider Maurer claimed a first win over Nikolaus Moser in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-08-19 | Austria F8 | R32 | clay | Nikolaus Moser | 6-0 6-3 |