Peter Heller defeated Raphael Baltensperger 6-2 7-6 in the Poland F1 round of 32 on clay.
Heller P. took it in straight sets.
Peter Heller beat Raphael Baltensperger 6-2 7-6(3). Umpiry, "Peter Heller vs Raphael Baltensperger — Poland F1 Round of 32", https://umpiry.com/match/2018-04-30/baltensperger-vs-heller-poland-f1-r32?utm_source=cite (as of 30 April 2018).