Peter Handscomb will become Australia's 219th ODI player when the home side look to take the lead in the ODI series against Pakistan on Thursday in Perth.
Handscomb is one of two changes to the side that lost to Pakistan in Melbourne on Sunday, as Billy Stanlake comes back into the side with Mitch Marsh and Mitchell Starc making way respectively
Australia XI: Warner, Khawaja, Smith, Handscomb, Head, Maxwell, Wade, Faulkner, Cummins, Hazlewood, Stanlake
"He's done really well so this is a good reward for a good summer," Lehmann said of Handscomb.
"Obviously we want four quality batters at the top so he'll get his chance there.
"It's bad luck for Chris Lynn ... the number four spot is there and Peter has done a really good job in the Test matches so he gets a crack at it.
"He played a one-day style innings for us in the Sydney Test, so he's got all the shots and he's quite innovative. Or if we lose early wickets he can consolidate."
