Marnus Labuschagne

Marnus Labuschagne has been retained in Australia's 16-man Test squad for next month's tour of South Africa, despite a difficult recent run with the bat that has raised serious questions about his place in the side.

Mitchell Starc was devastating with six wickets for just 12 runs, but Australia's top order once again crumbled under pressure as the second Test in Mackay produced a breathless opening day.