Petra Koch crashes out of Pan Pacific Open in Tokyo . 2011 Wimbledon champion goes out in second round to Petra Koch . Maria Sanchez and Caroline Wozniacki advance to third round . Defending champion Agnieszka Radwanska also through .
Petra Kvitova crashes out of Pan Pacific Open in Tokyo . 2011 Wimbledon champion goes out in second round to Petra Martic . Maria Sharapova and Caroline Wozniacki advance to third round . Defending champion Agnieszka Radwanska also through .