Piotr Grynkowski defeated Bartosz Wojnar 4-6 6-3 7-6 in the Czech Republic F1 qualifying round of 64 on clay.
Grynkowski P. came through in three sets.
Piotr Grynkowski beat Bartosz Wojnar 4-6 6-3 7-6(5). Umpiry, "Piotr Grynkowski vs Bartosz Wojnar — Czech Republic F1 Qualifying Round of 64", https://umpiry.com/match/2013-05-13/grynkowski-vs-wojnar-czech-republic-f1-q64?utm_source=cite (as of 13 May 2013).