London: The Wallabies have been dealt a devastating double blow to their World Cup campaign with Israel Folau and David Pocock ruled out of their quarter-final showdown with Scotland.

Folau broke down at training on Friday (Friday night AEDT) and has succumb to the ankle injury which has plagued him for two weeks.

David Pocock has been ruled out of the Wallabies' quarter-final against Scotland. Credit:Getty Images

It compounded news that Pocock had not recovered from a calf strain, with both now relegated to spectators as the Wallabies' World Cup hopes go on the line on Sunday (Monday AEDT).

The injury hits rocked the Wallabies' preparations as Folau failed to finish a training session and Kurtley Beale has been called on to fill the cross-code star's boots.