Khawaja looks like a certain bet to keep his place against in the two-match Test series.
However, the others will be vying for berths.
It's going to be a good headache for Australia.
We will closely monitor performances, says Trevor Hohns
"We will closely monitor performances in this match as well as the coming rounds of the Sheffield Shield before deciding upon our squad for the two-Test series against Pakistan," national selector Trevor Hohns said.
The selector is also looking at Pucovski and his Victoria teammate Maddinson.
"Both are exciting batsmen whom we've had our eye on for some time," Hohns said.
Can Joe Burns stake a claim?
Joe Burns was controversially left out of the Ashes 2019 squad has a big opportunity to impress top of the order in this warm-up Test. The 30-year-old, who has played 16 Tests for Australia, has done well in domestic cricket of late.
Interesting position for Carey in the Australian Test side
Carey, who has been doing well in limited-overs cricket of late, was unfortunate to miss out from the Ashes 2019 squad.
Test skipper Tim Paine leads the line and back-up Matthew Wade was chosen as a specialist batsman.
With Wade doing well, he is likely to retain his place.
It remains to be seen how Carey fits in the side.
A look at the Australia A squad to face Pakistan
Australia A squad: Alex Carey (captain), Marcus Harris, Joe Burns, Usman Khawaja, Will Pucovski, Travis Head, Nic Maddinson, Michael Neser, Jhye Richardson, Sean Abbott, Riley Meredith.