THE LOWDOWN ON . . .
Leinster's accuracy let them down on their visit to the south of France in the autumn and they will need to be right on the money from the kick-off tonight. Sean O'Brien is a loss, but Leo Cullen has gone with form elsewhere and the home side will look to keep the tempo high from the off.
How they beat you
Montpellier have the pure power to grind you down up front, but it is laced with some brilliant attacking backs who can cause major damage off good ball. If wingers Nemani Nadolo and Timoci Nagusa are getting into the game, Leinster could be in trouble.
With conditions set to be difficult, Springbok out-half Frans Steyn (pictured) will play a key role in Montpellier's night. Built more like a forward than a back these days, his ability to control things behind a big pack and choose the right moments to get the ball wide to the Fijian powerhouses out wide will be crucial.
HOW THEY STAND