Garbine Muguruza. Pic/AFP

Wimbledon champion Garbine Muguruza refused to blame her heat-blistered feet as she became the biggest casualty of the Australian Open so far on Thursday The third seed, whose preparation was hampered by a thigh injury, was always trailing against the 88-ranked Hsieh Su-wei from Taiwan before being edged out 7-6 (7/1), 6-4 in one hour and 59 minutes on Rod Laver Arena. "I maybe could have done things better, but at the end, she deserves to win.