David Thurner defeated Adrian Sikora 6-4 7-6 in the Germany F13 round of 32 on clay. The upset overturned the form book — Adrian Sikora came in leading the head-to-head 1–0. David Thurner claimed a first win over Adrian Sikora in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-09-30 | Germany F17 | R32 | carpet | Adrian Sikora | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.