Simona Halep defeated Danka Kovinic 6-4 6-2 in the Bucharest quarter-final on clay. The upset overturned the form book — Danka Kovinic came in defending last year's quarter-final.
Halep S. took it in straight sets.
Halep S. and Kovinic D. faced 6 of the same opponents in the last 12 months. Halep S. went 4–2 (67%) against them, Kovinic D. 1–6 (14%). Halep S. came out clearly better against 3 of 5 comparable opponents, Kovinic D. against 1 — though 1 of those edges carries caveats (lower-tier event).
Simona Halep beat Danka Kovinic 6-4 6-2. Umpiry, "Simona Halep vs Danka Kovinic — Bucharest Quarter-final", https://umpiry.com/match/2016-07-15/halep-vs-kovinic-bucharest-qf?utm_source=cite (as of 15 July 2016).