Roberta Vinci defeated Klara Koukalova 6-2 6-2 in the Zurich qualifying round of 16 on hard. The upset overturned the form book — Klara Koukalova came in leading the head-to-head 1–0. Roberta Vinci claimed a first win over Klara Koukalova in two meetings, levelling the head-to-head at 1–1.
Vinci R. took it in straight sets.
Vinci R. and Koukalova K. faced 3 of the same opponents in the last 12 months. Vinci R. went 2–1 (67%) against them, Koukalova K. 1–2 (33%). Results against comparable opponents are close (1 : 0 better-results split).
Only 3 common opponents — small sample, treat as indicative.
Roberta Vinci beat Klara Koukalova 6-2 6-2. Umpiry, "Roberta Vinci vs Klara Koukalova — Zurich Qualifying Round of 16", https://umpiry.com/match/2005-10-16/koukalova-vs-vinci-zurich-q16?utm_source=cite (as of 16 October 2005).