Since Shaun Edwards’ appointment as defensive coach, Wales have earned a reputation as a one of the toughest sides to break down in the Six Nations evidenced by the two tries they conceded in their 2008 Grand Slam success.

This campaign they have already shipped five tries and they face the free-flowing French who are in ominous form following impressive wins over champions Ireland and Scotland.

And Jenkins has demanded a complete 80-minute performance from his team to contain Grand Slam favourites France.

“We haven't played as well as we would have liked in the last few games,” said Jenkins.

“We have worked hard on our defence and other aspects of our game which were not as good as we would have liked against Scotland, and defence was one of those.

“Our defence will have to be at its very best if we are going to win on Friday night.

“We want to pick the intensity up, and we've got to do it against France or we will come unstuck. We only did it in patches against England and Scotland.”