Klara Koukalova defeated Elena Vesnina 4-6 6-0 6-4 in the New Haven quarter-final on hard. The result followed the form book — Klara Koukalova came in leading the head-to-head 1–0. Klara Koukalova extended the head-to-head to 2–0.
Koukalova K. came through in three sets.
Koukalova K. and Vesnina E. faced 9 of the same opponents in the last 12 months. Koukalova K. went 5–9 (36%) against them, Vesnina E. 5–4 (56%). Results against comparable opponents are close (2 : 3 better-results split).
Klara Koukalova beat Elena Vesnina 4-6 6-0 6-4. Umpiry, "Klara Koukalova vs Elena Vesnina — New Haven Quarter-final", https://umpiry.com/match/2013-08-19/koukalova-vs-vesnina-new-haven-qf?utm_source=cite (as of 19 August 2013).