Sara Errani defeated Yaroslava Shvedova 6-0 6-3 in the Charleston round of 32 on clay. The upset overturned the form book — Yaroslava Shvedova came in leading the head-to-head 3–2, defending last year's round of 32. That levelled the head-to-head at 3–3.
Errani S. took it in straight sets.
Errani S. and Shvedova Y. faced 4 of the same opponents in the last 12 months. Errani S. went 1–3 (25%) against them, Shvedova Y. 1–3 (25%). Results against comparable opponents are close (0 : 0 better-results split).
Only 4 common opponents — small sample, treat as indicative.
Clay: Errani S. leads 2–1 · Hard: level 1–1 · Grass: Shvedova Y. leads 1–0
Sara Errani beat Yaroslava Shvedova 6-0 6-3. Umpiry, "Sara Errani vs Yaroslava Shvedova — Charleston Round of 32", https://umpiry.com/match/2016-04-06/errani-vs-shvedova-charleston-r32?utm_source=cite (as of 6 April 2016).