Zizou Bergs defeated Peter Heller 6-4 6-1 in the Poland F1 semi-final on clay.
Bergs Z. took it in straight sets.
Zizou Bergs beat Peter Heller 6-4 6-1. Umpiry, "Zizou Bergs vs Peter Heller — Poland F1 Semi-final", https://umpiry.com/match/2018-04-30/bergs-vs-heller-poland-f1-sf?utm_source=cite (as of 30 April 2018).