Hilton Cartwright will make his test debut at the Sydney Cricket Ground, while Steve O'Keefe has pipped Ashton Agar to claim the final spot in the Australian cricket line-up for their third clash with Pakistan.
Cartwright will replace Nic Maddinson at No.6 in a reshuffled batting order, while left-arm spinner O'Keefe has taken unlucky paceman Jackson Bird's spot in the side for the game that starts on Tuesday.
"He bowled particularly well in Melbourne, but conditions sometimes change the team," skipper Steve Smith said of Bird.
"We're playing the two spinners, traditionally out here it does take some spin."
Smith added allrounder Cartwright, the 24-year-old son of a Zimbabwean tobacco farmer, deserved his call-up. He has played a total of 16 first-class games, averaged 74.75 with the ball and 36.6 with the bat in the first half of the current Sheffield Shield season.