"It was very important for us to win at Perpignan after playing so poor the previous week at Stade de France against Racing-Metro," said Poitrenaud.
"It was not just the result that was important but also our attitude on the field.
"It is always very hard to play in Perpignan and they showed that when they came back from 6-14 to lead 21-14.
"But we didn't lose our spirit or power and that was good. We showed a lot of courage to come back and win.
"That is a great way to arrive for a quarter-final against Biarritz, when we will need all that confidence to produce a big performance.
"There is always a great atmosphere in San Sebastien, it is a beautiful stadium, the sun will be shining and the football pitch makes for a very fast surface to play on."