Loading...Frances Tiafoe v Daniil MedvedevFrances Tiafoe v Daniil MedvedevREPLAYWASHINGTON2019R3Watch a match replay as third seed Daniil Medvedev comes up against American Frances Tiafoe, the No. 16 seed, for a place in the semi-finals of the Citi Open in Washington.