Nikolaus Moser defeated Mario Haider Maurer 6-0 6-3 in the Austria F8 round of 32 on clay. The upset overturned the form book — Mario Haider Maurer came in leading the head-to-head 1–0. Nikolaus Moser claimed a first win over Mario Haider Maurer in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-08-26 | Austria F9 | R32 | clay | Mario Haider Maurer | 7-5 6-3 |