Tristan Samuel Weissborn defeated Mario Haider Maurer 6-3 6-4 in the Austria F8 qualifying round on clay. The upset overturned the form book — Mario Haider Maurer came in leading the head-to-head 1–0. Tristan Samuel Weissborn 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 |
|---|---|---|---|---|---|
| 2014-07-21 | Austria F5 | R32 | clay | Mario Haider Maurer | 7-6(4) 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.