Sania loses in Madrid doubles

Meanwhile, Czech Petra Kvitova kick-started her title defence at the Madrid Masters yesterday with a 6-2, 6-3 defeat of New Zealand's Marina Erakovic.u00a0

Sania Mirza

Serena Williams started out with a victory over Russian Elena Vesnina 6-3, 6-1. Elsewhere, Andrea Hlavackova beat Anastasia Rodionova 6-1, 6-4 while Lucie Hradecka defeated Peng Shuai 6-4, 5-7, 6-4.u00a0