Jan Hajek defeated Mikhail Kukushkin 6-3 6-2 6-4 in the KAZ vs CZE round robin on clay. The upset overturned the form book — Mikhail Kukushkin came in leading the head-to-head 1–0. Jan Hajek claimed a first win over Mikhail Kukushkin in two meetings, levelling the head-to-head at 1–1.
Hajek J. took it in straight sets.
Clay: Hajek J. leads 1–0 · Hard: Kukushkin M. leads 1–0
Jan Hajek beat Mikhail Kukushkin 6-3 6-2 6-4. Umpiry, "Jan Hajek vs Mikhail Kukushkin — KAZ vs CZE Round Robin", https://umpiry.com/match/2013-04-05/hajek-vs-kukushkin-kaz-vs-cze-rr?utm_source=cite (as of 5 April 2013).