Simon Greul defeated Jan Hajek 2-6 6-4 6-1 in the Barcelona qualifying round of 16 on clay. The upset overturned the form book — Jan Hajek came in leading the head-to-head 2–0, defending last year's round of 32. Simon Greul claimed a first win over Jan Hajek in three meetings, narrowing the head-to-head to 2–1.
Greul S. came through in three sets.
Clay: level 1–1 · Hard: Hajek J. leads 1–0
Simon Greul beat Jan Hajek 2-6 6-4 6-1. Umpiry, "Simon Greul vs Jan Hajek — Barcelona Qualifying Round of 16", https://umpiry.com/match/2011-04-17/greul-vs-hajek-barcelona-q16?utm_source=cite (as of 17 April 2011).