Picamoles displays his incredible strength as he rips the ball from Smith

Great work by Castres at the breakdown sees them turn the ball over and now look to come on the counter attack

Saints win the lineout and now Northampton look to use their big forwards to make some ground here

North kicks downfield, Palis deals with it, he passes to Smith who kicks across the pitch to touch

Saints win the lineout and Groom looks to work it wide

Saints win the lineout and look to work it wide, Mallinder tries a kick into the corner but Palis deals with it well and sends a beautiful kick into touch inside the Saints' half

Kockott comes back on after serving his 10 minutes in the sin bin

Palis sends a kick downfield into touch

Groom kicks aimlessly downfield, Castres deal with and come again on the attack

Northampton looking to punch a whole in the middle of the Castres defence with direct running