SINGAPORE — Debutant Garbine Muguruza made it three straight singles wins at the WTA Finals on Friday but the Spanish world number three was anything but storming through to the semi-finals after conceding an exhaustive schedule was taking its toll.
The Spaniard is also playing the doubles in Singapore with compatriot Carla Suarez Navarro and spent what should have been her rest day on Thursday battling past Taiwanese pair Chan Yung-jan and Chan Hao-ching to make the last four of that event.
The extra drain was clearly visible on the Venezuelan-born Muguruza but she showed great fight to edge double Wimbledon champion Petra Kvitova 6-4 4-6 7-5 to set up a last four clash with Agnieszka Radwanska on Friday.