Yulia Putintseva defeated Alison Riske 6-3 7-5 in the Toronto round of 16 on hard. The upset overturned the form book — Alison Riske came in leading the head-to-head 2–1, but Yulia Putintseva had been the form player, winning 3 of their last 7 on hard. Yulia Putintseva narrowed the head-to-head to 2–2.
Putintseva Y. took it in straight sets.
Putintseva Y. and Riske A. faced 3 of the same opponents in the last 12 months. Putintseva Y. went 0–3 (0%) against them, Riske A. 1–2 (33%). Results against comparable opponents are close (0 : 1 better-results split).
Only 3 common opponents — small sample, treat as indicative.