Andrei Cherkasov defeated Carlos Costa 6-3 7-5 in the Prague quarter-final on clay. The upset overturned the form book — Carlos Costa came in leading the head-to-head 1–0. Andrei Cherkasov claimed a first win over Carlos Costa in two meetings, narrowing the head-to-head to 1–1.
Cherkasov A. took it in straight sets.