Cape Town - Wallabies coach Michael Cheika is keeping an open mind about the Wallabies back-row makeup. Switching David Pocock back to seven is even an option for Australia.Pocock has been playing at number eight for the Wallabies for the past season, one-half of the ‘Pooper’ with Michael Hooper, but Cheika said he would consider a number of options in a bid to establish more versatility in the team.Rebels back-rower Sean McMahon stepped in for Pocock at eight in Perth and also in June’s England Test series, and looms as the likely replacement"If we look non-traditional, like we've been running with, his ready replacement... Sean McMahon, (is) slightly different, very strong running player," Cheika told the Australian Rugby official website. "He took the spot the other day, he's been knocking on the door for quite a while."Lopeti Timani is a more traditional number eight and will be travelling with the squad after notching his Test debut against Argentina and Cheika said he was considering different combinations"There's a few guys starting to, younger guys that are coming into the picture that can provide that and maybe a couple of older guys coming back ... that have the more traditional jumping, running, link man."We want to be able to have both options, so there's going to be a few different options tried out over there."Pocock should be available for the Spring Tour, before going on his 2017 sabbatical, and Cheika didn’t rule out experimenting with the Wallabies mainstay."He'll still have an opportunity to play in that jersey or even in the seven jersey maybe," Cheika said."We’ve always wanted to have both options so we've got to make sure we’ve got the two ways to play."Reds’ number eight Leroy Houston starred for Bath in the Premiership last weekend, in a short-term injury contract, and Cheika said he would be in consideration for Spring Tour.Houston was in the Wallabies extended squad in June, but was left out of the Rugby Championship group, with a mandate to improve his fitness for a shot at Spring Tour.