Samantha Stosur defeated Lara Arruabarrena 6-3 6-4 in the Mallorca round of 16 on grass. The upset overturned the form book — Lara Arruabarrena came in leading the head-to-head 2–0. Samantha Stosur claimed a first win over Lara Arruabarrena in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-07-13 | Bastad | R16 | clay | Lara Arruabarrena | 7-6(5) 6-0 |
| 2015-04-06 | Charleston | R32 | clay | Lara Arruabarrena | 6-3 3-6 6-4 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.