Timea Bacsinszky defeated Alison Riske 7-5 6-4 in the Nassau 100K round of 32 on hard. The upset overturned the form book — Alison Riske came in leading the head-to-head 2–0. Timea Bacsinszky claimed a first win over Alison Riske in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-11 | Toronto | R64 | hard | Alison Riske | 3-6 7-6(4) 7-6(3) |
| 2013-10-28 | Barnstaple 75K | R16 | hard | Alison Riske | 6-4 7-6(6) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.