Marek Gengel defeated Filip Duda 6-1 7-6 in the M15 Piestany 1 quarter-final on clay. The upset overturned the form book — Filip Duda came in leading the head-to-head 1–0, but Marek Gengel had been the form player, winning 2 of their last 5 on clay. Marek Gengel claimed a first win over Filip Duda in two meetings, narrowing the head-to-head to 1–1.
Gengel M. took it in straight sets.
Clay: Gengel M. leads 1–0 · Carpet: Duda F. leads 1–0