Warren Gatland hopes France are still hungover for the Wales match on Saturday after celebrating their England victory.
Wales beat Italy with a bonus point on Sunday to move second in the Six Nations table, and another such victory over France on the final day would cement that place.
Jacques Brunel had to axe eight players for boozing in Edinburgh after the Scotland defeat.
Warren Gatland hopes France are still hungover for the Wales match on Saturday
And Gatland is banking on France being unable to produce two stunning performances in a row after partying too hard following their demolition of England.
'I hope they have been partying all night in Paris after that win - they deserve it,' said Gatland.
'They have had a lot of things that have gone against them and even had to regroup in this championship with some players moving out of the squad.
'You have to take your hat off to Jacques Brunel in terms of the discipline he has brought into the squad. They played with discipline against England.
'They were really direct with the way that they played and deserved to win the match.
Gatland is hoping France can't produce two stunning performances after defeating England
Jacques Brunel had to axe eight players for boozing in Edinburgh after the Scotland defeat
'I think they'll be good. Their defence looks strong at the moment, it was good in the first game against Ireland.
'They were unlucky not to win that, and then they started well against Scotland. Probably conditioning and fitness wise it cost them a little but having a few more games under their belt, and a win against Italy, they are showing some cohesion now having been together for a number of games. I thought they were exceptionally good against England.
'It is going to be a tough game for us, we are pretty happy with the record we have had against France in the past and we know there is an opportunity for us to finish second in the championship which is pretty important for us.'
Gatland will likely recall captain Alun Wyn Jones for the final Six Nations game in Cardiff and tinker with his front and back row.