The Williams sisters are out!
Serena lost to Bartoli 3-6, 6-7 while Venus lost to Pironkova 2-6, 3-6.
Sharapova is the only remaining former Wimbledon and grandslam winner!
World no.1 Wozniacki was also booted out, losing to Cibulkova in 3 sets 6-1, 6-7, 5-7.