Michael Clarke drives, Australia v Sri Lanka, 2nd Test, day two, Melbourne, December 27, 2012© Getty Images
Chanaka Welegedara leaves the field after suffering a hamstring injury, Australia v Sri Lanka, 2nd Test, day two, Melbourne, December 27, 2012© AFP
Chanaka Welegedara leaves the field with a suspected hamstring injury, Australia v Sri Lanka, 2nd Test, Melbourne, 2nd day, December 27, 2012© Getty Images