Jan Satral defeated Peter Heller 6-0 6-4 in the Czech Republic F9 qualifying round on hard.
Satral J. took it in straight sets.
Jan Satral beat Peter Heller 6-0 6-4. Umpiry, "Jan Satral vs Peter Heller — Czech Republic F9 Qualifying Round", https://umpiry.com/match/2017-11-06/heller-vs-satral-czech-republic-f9-qf?utm_source=cite (as of 6 November 2017).