Renata Kolbovic defeated Dawn Buth 6-2 6-2 in the Oklahoma qualifying round on hard. The upset overturned the form book — Dawn Buth came in leading the head-to-head 2–1, but Renata Kolbovic had been the form player, winning 2 of their last 7 on hard. That levelled the head-to-head at 2–2.
Kolbovic R. took it in straight sets.
Hard: Kolbovic R. leads 2–1 · Clay: Buth D. leads 1–0
Renata Kolbovic beat Dawn Buth 6-2 6-2. Umpiry, "Renata Kolbovic vs Dawn Buth — Oklahoma Qualifying Round", https://umpiry.com/match/2001-02-19/buth-vs-kolbovic-oklahoma-qf?utm_source=cite (as of 19 February 2001).