Castres strike a blow for Wasps with surprising victory over Perpignan
It means the London side top Pool One, but with tricky games to come against both French sides, this pool may take a twist or two yet.
In Pool Two, Leinster have taken firm control on the back of their impressive win over Agen on Saturday. Gloucester beat Edinburgh 38-22 the same day and look to be coming into form at just the right time to put pressure on Agen for the second spot. With the French outfit’s form on the road open to question, Gloucester may need to beat Leinster at home in the last pool game to go through.