Mari Osaka defeated Sanaz Marand 7-5 6-4 in the W100 Charleston 1 q16 on clay. The upset overturned the form book — Sanaz Marand came in leading the head-to-head 3–0. Mari Osaka claimed a first win over Sanaz Marand in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-10-28 | New Braunfels TX 50K | R16 | hard | Sanaz Marand | 6-2 6-3 |
| 2013-10-14 | Rock Hill SC 25K | R32 | hard | Sanaz Marand | 7-5 5-7 7-6(5) |
| 2012-10-22 | Florence SC 25K | R32 | hard | Sanaz Marand | 6-3 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.