Zdenek Kolar defeated Zdenek Derkas 6-2 6-4 in the Czech Republic F1 round of 32 on clay.
Kolar Z. took it in straight sets.
Zdenek Kolar beat Zdenek Derkas 6-2 6-4. Umpiry, "Zdenek Kolar vs Zdenek Derkas — Czech Republic F1 Round of 32", https://umpiry.com/match/2015-05-11/derkas-vs-kolar-czech-republic-f1-r32?utm_source=cite (as of 11 May 2015).