The big names hit the courts in Miami at the Sony Ericsson Open on Thursday. A star-studded line-up sees Maria Sharapova, Caroline Wozniacki and Sam Stosurlining up on Stadium Court, while Svetlana Kuznetsova and Li Na are in action on Grandstand. Stosur's up against Zheng Jie, before Wozniacki takes on home hopeBethanie Mattek-Sands . Sharapova heads up the night session against wildcard Petra Martic. Jankovic, Peer, Pennetta, Petrova, Rezai and Petkovic are among other WTA stars playing their second round matches.