Claude Julien was disappointed as he sat at the podium following the Bruins’ 4-2 loss to the Ottawa Senators on Sunday, but he had a clear message.

He said the team needs to turn the page as it begins the playoffs tomorrow night against Toronto.

“All I know is that we’re starting a new season,” the coach said.

And the rest of his team relayed that sentiment. The Maple Leafs come to the Garden this week having lost 3-of-4 games during the regular-season series, but Bruins are throwing the positives — and negatives — out the window as the playoffs begin.

“Yeah, we did (have success against Toronto), but it doesn’t matter in the end,” defenseman Dennis Seidenberg said. “Again, the playoffs are a new chapter. . . . And everybody starts from zero. We’re going to have to take it as serious as ever and play our best hockey.”

Starting over is important for the B’s and Leafs, who both stumbled into the playoffs. The Bruins were 2-3-1 in their final six games, while Toronto was 2-4-0.

As for the season series, all four games were tight. Two of the three Bruins wins were by one goal, and in the other — a 4-2 decision March 7 — the Leafs got a goal from Jay McClement early in the third period to make it 3-2 before Tyler Seguin answered with an insurance tally.