Stefan Koubek defeated Tomas Zib 6-2 6-3 in the US Open qualifying round of 32 on hard. The upset overturned the form book — Tomas Zib came in leading the head-to-head 1–0, defending last year's round of 128. Stefan Koubek claimed a first win over Tomas Zib in two meetings, levelling the head-to-head at 1–1.
Koubek S. took it in straight sets.
Koubek S. and Zib T. faced 1 of the same opponent in the last 12 months. Koubek S. went 1–0 (100%) against them, Zib T. 1–0 (100%).
Only 1 common opponent — too few for any conclusion. Shown without assessment.
Hard: Koubek S. leads 1–0 · Clay: Zib T. leads 1–0
Stefan Koubek beat Tomas Zib 6-2 6-3. Umpiry, "Stefan Koubek vs Tomas Zib — US Open Qualifying Round of 32", https://umpiry.com/match/2006-08-25/koubek-vs-zib-us-open-q32?utm_source=cite (as of 25 August 2006).