Australian coach Darren Lehmann says every player is on notice following Australia's humiliating loss to South Africa in the first Test at the WACA on Monday.
The Aussies added two players to its squad for the second Test, with Callum Ferguson and Joe Burns coming in, while Shaun Marsh has been ruled out with a broken finger.
Lehmann says every member of the squad could play in the second Test.
"Any of the 13 could play," Lehmann said.
"That gives us a middle order (option) or an opener.
"But I would say every spot is under pressure.
"That's the nature of the beast if you don't have success."
Lehmann also refused to be drawn into speculation that Mitch Marsh's luck may have run out after another lean Test.
"We would like him to bat for a longer period of time in Test Matches for us," Lehmann said.
"So, that's a challenge for him to make more runs in Test Matches or Shield cricket or whatever cricket he is playing.
"When you are a multi-format player you don't get too many opportunities.
"That's the hardest thing.
"But he looked good today.
"I thought he batted quite well and was a bit unlucky with the decision (a controversial lbw call that was overturned on review), but that is part of the game as well."
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