PERTH, AUSTRALIA - DECEMBER 03: Michael Clarke of Australia gets struck in the groin during day four of the Third Test Match between Australia and South Africa at WACA on December 3, 2012 in Perth, ... more 

PERTH, AUSTRALIA - DECEMBER 03: Michael Clarke of Australia gets struck in the groin during day four of the Third Test Match between Australia and South Africa at WACA on December 3, 2012 in Perth, Australia. (Photo by Paul Kane/Getty Images) less