Wednesday 6 January 2016 15:24, UK
Garbine Muguruza joined the list of casualties at the Brisbane International as blistered feet forced her retirement.
The world No 3 was trailing 6-7 (9-11) 0-1 in her second-round match against Varvara Lepchenko when she quit with her movement restricted by a heavily bandaged left foot.
Maria Sharapova and Simona Halep pulled out of the Australian Open warm-up before their first-round ties, and Muguruza's withdrawal leaves fourth seed Angelique Kerber as the highest-ranked remaining player.
Kerber beat American Madison Brengle 6-3 6-0 to set up a quarter-final against Anastasia Pavlyuchenkova, while Lepchenko faces Carla Suarez Navarro in the last eight.
