Results from the ATP Qatar Open in Doha on Thursday (x denotes seeding): Quarter-finals Andrey Rublev (RUS x3) bt Marton Fucsovics (HUN) - walkover Taylor Fritz (USA) bt Denis Shapovalov (CAN x4) 5-7, 6-3, 7-5 Nikoloz Basilashvili (GEO) bt Roger Federer (SUI x2) 3-6, 6-1, 7-5 afp