Ana Ivanovic defeated Polona Hercog 6-2 6-3 in the Toronto round of 16 on hard. The upset overturned the form book — Polona Hercog came in leading the head-to-head 1–0. Ana Ivanovic claimed a first win over Polona Hercog in two meetings, levelling the head-to-head at 1–1.
Ivanovic A. took it in straight sets.
Ivanovic A. and Hercog P. faced 8 of the same opponents in the last 12 months. Ivanovic A. went 6–6 (50%) against them, Hercog P. 4–8 (33%). Results against comparable opponents are close (1 : 1 better-results split).
Ana Ivanovic beat Polona Hercog 6-2 6-3. Umpiry, "Ana Ivanovic vs Polona Hercog — Toronto Round of 16", https://umpiry.com/match/2015-08-10/hercog-vs-ivanovic-toronto-r16?utm_source=cite (as of 10 August 2015).