Marek Semjan defeated Pavel Staubert 6-2 6-4 in the Czech Republic F2 qualifying round of 16 on clay. The upset overturned the form book — Pavel Staubert came in leading the head-to-head 1–0. Marek Semjan claimed a first win over Pavel Staubert in two meetings, levelling the head-to-head at 1–1.
Semjan M. took it in straight sets.
Marek Semjan beat Pavel Staubert 6-2 6-4. Umpiry, "Marek Semjan vs Pavel Staubert — Czech Republic F2 Qualifying Round of 16", https://umpiry.com/match/2016-05-16/semjan-vs-staubert-czech-republic-f2-q16?utm_source=cite (as of 16 May 2016).