Paille/By S. Bradley

PHILADELPHIA — It didn’t take long for Philadelphia defenseman Chris Pronger to get irritated with the Bruins.

But if the towering blueliner was trying to knock the Bruins off course when his team was down 1-0, he failed.

Boston went on to a 7-3 win in Game 1 of its Eastern Conference semifinal series with the Flyers at the Wells Fargo Center.

Most notably, Pronger slashed Bruins forward Daniel Paille while the winger was down on the ice in the Philadelphia zone 9:36 into the opening period. Paille and Pronger had been chasing down an icing, and Paille was about to be assessed a minor for tripping.

Paille kept his cool and it wound up being a 4-on-4, which was a positive until Philadelphia scored 1:26 later.

“He was angry, obviously. I know I wasn’t going there to hit him at all. I lifted his stick and he fell,” said Paille after the game. “I know how he is, he likes to get agitated. I just didn’t retaliate. It was good to see the ref, if he was going to give me a penalty, I’m glad he gave him a penalty too … until they scored.”

Later in the game, Pronger played peacemaker after he was tripped by Brad Marchand. James van Riemsdyk went after Marchand but Pronger intervened. More importantly, Marchand didn’t do anything to further hurt his team.

“I think they were just a little excited and maybe they didn’t know I had a penalty,” said Marchand of the incident.

The Bruins put the Flyers on the power play five times in the game. But all Boston’s violations were stick penalties rather than anything having to do with the agitating of the Flyers, who were playing from behind all night.