Miami: Russian second seed Maria Sharapova cruised into the fourth round of the ATP/WTA Miami Masters tournament by beating American qualifier Sloane Stephens 6-4, 6-2 on Saturday.

Sharapova, who is a three-time runner-up in Miami, advances to face unseeded Russian compatriot Ekaterina Makarova who beat Mona Barthel of Germany 6-2, 6-4.