Rain and injury clouds continued to unhappily linger over key Wallabies at their London training base overnight.

Star trio David Pocock, Israel Folau and Scott Sio played next-to no part in Australian training sessions and remain in considerable doubt to play against Argentina in the World Cup semi-final on Monday.

Pocock (calf strain) didn’t train, but instead rode an exercise bike, while Folau ran for a short while before leaving the field and icing his injured ankle again.

Sio (elbow) also participated briefly but appears to be in major doubt to line up against the Pumas.

Read more at FoxSports.com.au