Kateryna Volodko defeated Ai Sugiyama 6-2 6-1 in the Zurich qualifying round on hard. The upset overturned the form book — Ai Sugiyama came in defending last year's round of 16.
Volodko K. took it in straight sets.
Volodko K. and Sugiyama A. faced 4 of the same opponents in the last 12 months. Volodko K. went 0–6 (0%) against them, Sugiyama A. 2–2 (50%). Sugiyama A. came out better against 2 of 4 comparable opponents, Volodko K. against 0.
Only 4 common opponents — small sample, treat as indicative.
Kateryna Volodko beat Ai Sugiyama 6-2 6-1. Umpiry, "Kateryna Volodko vs Ai Sugiyama — Zurich Qualifying Round", https://umpiry.com/match/2007-10-15/sugiyama-vs-volodko-zurich-qf?utm_source=cite (as of 15 October 2007).