Nathan Lyon in his delivery stride, South Africa v Australia, 2nd Test, Johannesburg, 3rd day, November 19, 2011© AFP
Nathan Lyon appeals unsuccessfully, South Africa v Australia, 2nd Test, Johannesburg, 3rd day, November 19, 2011© AFP
AB de Villiers leaves the ground to pull, South Africa v Australia, 2nd Test, Johannesburg, 3rd day, November 19, 2011© AFP