The Waratahs have brought utility back Ben Volavola in to their squad as cover for injured wing duo Peter Betham and Alofa Alofa.
According to the Waratahs' official website, Volavola will fly to Perth as emergency injury cover after the Waratahs lost Betham and Alofa in their 22-11 win over the Stormers on Saturday.
Scans in Cape Town on Sunday confirmed a break in Betham's left foot while fellow speedster Alofa suffered a medial ligament strain in his right knee.
Bethan and Alofa stayed overnight in Johannesburg before flying to Sydney on Monday, instead of joining the team who flew straight to Perth for this Saturday's re-match against the Western Force.
But Alofa and Betham aren't the only concerns for Waratahs boss Michael Cheika, second-row Kane Douglas is being monitored for a sore neck after the Stormers clash.
Utility back Matt Carraro is receiving treatment for a cut to his head and Sekope Kepu picked up an ankle niggle but all three are still hopeful of playing against the fifth-placed Force.
On the positive side, the 'Tahs are confident number eight Wycliff Palu will be fit to play after resting the ankle he hurt in the loss to the Sharks in Durban the previous week.
And full-back Israel Folau should finally return to the starting side after a throat injury confined him to the sidelines during his week-long visit to South Africa.
The squad arrives in Perth on Monday, leaving them just four days to shake off jet lag and prepare to face the team one spot below them on the table.
The 'Tahs' win over the Stormers in Cape Town is just the second time in 20 attempts that a visiting side had won a game after crossing the Indian Ocean. It lifts them to fourth on the overall ladder with a game in hand.