Western Force lock Ross Haylett-Petty has been ruled out of Friday night's Super Rugby clash with the Crusaders, but prop Francois van Wyk will make his return off the bench.
Haylett-Petty copped a heavy head knock in last week's 32-20 loss to the Highlanders.
His place in the starting side has been taken by Steve Mafi.
Steve Mafi returns to @westernforce run-on side for 1st time since Round 2. Ross Haylett-Petty given week off after suffering head knock— FOX SPORTS News (@FOXSportsNews) April 6, 2016
Van Wyk has been named on the bench for his first game this season after recovering from surgery to fix a dislocated wrist.
The Crusaders have snared four wins from five games this season, but the injury-hit Force are struggling with a 1-5 record including a torrid three-game road trip to New Zealand.
Western Force: Dane Haylett-Petty, Luke Morahan, Ben Tapuai, Solomoni Rasolea, Semisi Masirewa, Peter Grant, Alby Mathewson, Ben McCalman, Matt Hodgson (capt), Angus Cottrell, Adam Coleman, Sitiveni Mafi, Tetera Faulkner, Heath Tessmann, Pek Cowan. Res: Nathan Charles, Francois van Wyk, Jermaine Ainsley, Rory Walton, Richard Hardwick, Ryan Louwrens, Ian Prior, Albert Nikoro