McKenzie had been hampered by cramp during Sunday's play, and the problems returned after another herculean display of resistance, prompting South African skipper Graeme Smith to return to the crease as a runner.

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The left-hander seemed to show no lingering discomfort from the hairline fracture which kept him out for three weeks, although he had his bowlers - as well as some injudicious batting from the tourists - to thank for a swift return to the crease.

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