Leinster's Cup future on the line
The 33-6 win by the Premiership side was the biggest defeat suffered by Leinster in Dublin, since Munster won the semi-final battle at Lansdowne Road in 2006 by 24 points. While that wasn't technically a home game for Leinster, Wasps' win is the biggest win by a visiting team in Europe on Leinster's home patch – since Leicester Tigers won by 17 points in the 1996/97 season.
"I'm really disappointed with the way we performed. We gifted them a penalty for a bind at the scrum, then we got turned over for another penalty and then we gave away a cheap seven points for the try.
"They really were 16 cheap points in the first half and we just didn't manage our way into the game. We were disjointed, something we were worried about coming into the game but I didn't think it would be as bad as that. You saw experienced players making uncharacteristic mistakes. We had to make a few late changes but we should have been good enough on the day.
"Credit to Wasps, they came with a pretty simple game plan and did it very well. We know we can be a lot better than that," Cullen said.
The last English side to win at the RDS was London Irish in the opening game of 2009. With the reigning champions Toulon, and Bath in their pool, Cullen knows just how tough this campaign is going to be.
"We created a few opportunities but we weren't accurate enough across the board and forced things. We turned the ball over too often. We know we can be a lot better than that and we have a mountain to climb. We knew this pool was going to be tough, but now it has just got tougher.
"It leaves us scrambling. We have lost our first game in a pool before and come back to qualify but this is going to be much harder now. We simply can't afford to look further than the Bath game now. We need to show character and show what we are made of," he added.
@ChampionsCup
