Wallabies prop Allan Alaalatoa will miss the third Test with the British & Irish Lions due to a shoulder injury.
Alaalatoa picked up the knock during last week's defeat at the MCG, with the Brumbies skipper not returning at half-time.
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"He's a massive part of the group," forward Jeremy Williams said on the veteran prop.
"You just [need to] see the work he puts in on and off the field...We just wish him the best in his recovery and hopefully he'll be back out there soon."
The injury opens the door for the likes of Tom Robertson, Taniela Tupou and Zane Nonggorr to start on Saturday in Sydney.
Robertson has come off the bench for the opening two Tests; however, a strong performance for First Nations Pasifika has put the powerful Tupou back in contention.
Meanwhile, Nonggorr is one of the few players who have not faced the Lions for club or country on this tour alongside James O'Connor
Former Chiefs prop Aidan Ross has come into the group, with Williams impressed with what the new Red has brought to the group.
"He's a great bloke and he trains really hard," the Force skipper said.
"He's been in a few different systems now, so I'm sure he's going to add a lot of value to the group, and he's been going really hard.
"It's great to have him."
The Wallabies have already been forced into a change, with Harry Potter leaving the camp after picking up a hamstring injury.
