Kei Nishikori -- who also beat Czech opposition in the shape of Lukas Rosol . ` Second seed Rafael Nadal through to the fourth round of Miami Masters . The three - time runner - up at the U.S. hard - court championships beat Czech Peter Fleming . No . 4 Andy Murray handed a walkover after opponent Milos Raonic had to withdraw . Murray handed a walkover after opponent Sebastian Raonic had to withdraw through injury .
Second seed Rafael Nadal through to the fourth round of Miami Masters . The three - time runner - up at the U.S. hard - court championships beat Czech Peter Fleming . No . 4 Andy Murray handed a walkover after opponent Milos Raonic had to withdraw . Murray handed a walkover after opponent Sebastian Raonic had to withdraw through injury .