Nina Stadler defeated Sara Ottomano 6-4 6-1 in the Caslano 10K round of 32 on clay. The upset overturned the form book — Sara Ottomano came in leading the head-to-head 1–0. Nina Stadler claimed a first win over Sara Ottomano in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-06-17 | Lenzerheide 25K | Q16 | clay | Sara Ottomano | 6-1 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.