"We knew how hard it was going to be coming away to France. Any game over here is tough, especially in a cauldron like this," said O'Mahony.
"We knew it would take something special to get a win and as happened it was a special performance from a team that wasn't playing particularly well.
"But the sign of a good team and a team that is progressing is to get a win like that out in France. It is certainly going to be up there in many books.
"We wanted to win more than anything. We expected a fight and we got it all right - it was bruising and there will be plenty of sore bodies.
"We spoke about that and we said it would pay off. We said that if we went to a dark place, and we hurt ourselves, we were going to be in a good place. And that's where we are - we are in a good place.
"We have two to go but this has put us in a good position. We will enjoy this over Christmas."
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