David Poljak defeated Ondrej Krstev 6-1 7-5 in the Czech Republic F1 round of 32 on clay.
Poljak D. took it in straight sets.
David Poljak beat Ondrej Krstev 6-1 7-5. Umpiry, "David Poljak vs Ondrej Krstev — Czech Republic F1 Round of 32", https://umpiry.com/match/2017-05-15/krstev-vs-poljak-czech-republic-f1-r32?utm_source=cite (as of 15 May 2017).