But Australian rugby great George Smith could emerge as the perfect replacement, with his manager admitting Smith would always help the Brumbies if they "desperately need him".

Pocock flew to Brisbane on Tuesday for scans amid fears he had suffered another anterior cruciate ligament tear in his left knee.

The champion No. 7 will get one last check on his knee on Wednesday before it is decided if he will need surgery.

Pocock will miss the clash against the Wellington Hurricanes on Friday night but the Brumbies are holding hope the 25-year-old will be fit in the coming weeks.

The worst case scenario is Pocock will need a second knee reconstruction in just 12 months.

"The scans have been a bit inconclusive so I have to go back and talk our team doctor, [surgeon] Peter Myers and the coaches to work out a way forward," Pocock said.

Former Wallaby Rod Kafer declared Smith could be a revelation if the Brumbies recruit him as Pocock's potential replacement.

Smith will arrive in Australia next week after ending his Japanese career with the Suntory Sungoliaths.

He has signed a two-year deal with French club Lyon with the season to start in September.

Smith will spend the coming months in Australia and his manager, Mark Jones, admitted the 33-year-old would always consider helping the Brumbies if they "desperately need him".

Smith, a veteran of 111 Tests for the Wallabies and 142 games for the Brumbies, made a Super Rugby comeback last year after retiring at the end of 2010.

"His [Smith] plan is to have a good break before heading to France with his family . . . he hasn't had a break in the past two years," said Jones.

"I can't see that changing. But George has always said if the Brumbies ever desperately need him for something, that he'll take the call and have a chat.

Pocock had a knee reconstruction 12 months ago and Smith took over the openside flanker duties.

"There's no question that if the Brumbies could get George Smith again he would be another revelation like he was last year," Kafer said.

"He's clearly got the capability, there's no question he could play Super Rugby and more than likely Test rugby. He'd be a great person to fill the void."

Pocock's left knee appeared to buckle when he attempted to change directions in the dying minutes of the match against the Force.

Scans in Canberra were inconclusive and he flew to Brisbane to meet surgeon Peter Myers – the same doctor who reconstructed his knee last year.

The tear is on the graft from the reconstruction, but Pocock could play again this season if the tear is minor.

Jarrad Butler is set to take the No. 7 duties against the Wellington Hurricanes in New Zealand on Friday night.

The Brumbies still have one free roster spot available, as Ita Vaea is recovering from a heart condition.

But they are opting to delay any decision on potential recruits, including Smith, until they have more details on Pocock's injury.

"We'd certainly look at all options, we feel like we've got good coverage in the team," said Stephen Larkham, the Brumbies coach.

"We'll spend time thinking about options after we get the results.

"But we're focused on the game against the Hurricanes and getting things right there."