Tsitsipas, Sakkari win mixed doubles against Federer, Bencic

Stefanos Tsitsipas and Maria Sakkari of Greece celebrate winning their mixed doubles match against Switzerland's Roger Federer and Belinda Bencic at the Hopman Cup in Perth, Australia, Thursday. The Greek duo won in three sets (4-3, 2-4, 4-3). [Trevor Collens/AP]