Results from the WTA Dubai Open on Tuesday (x denotes seeding): Anastasia Potapova (RUS) bt Madison Keys (USA x11) 6-4, 6-3 Belinda Bencic (SUI x6) bt Veronika Kudermetova (RUS) 6-4, 5-7, 6-4 Cori Gauff (USA) bt Marketa Vondrousova (CZE x12) 3-6, 6-0, 6-4 Karolina Plískova (CZE x2) bt Anastasija Sevastova (LAT) 6-3, 6-7 (5/7), 6-2 afp