Timo Meier scored, and Jake Allen made 30 saves for the Devils (28–25-2), who have lost three of their past four games.

“I thought we were right there,” New Jersey coach Sheldon Keefe said. “We were in the hockey game, and we had some chances, we could have very easily either won that game or certainly got it to overtime. But it’s a mistake here or there that they made good on, or power play that they made good on, and that’s also been the difference.”

After killing back-to-back penalties to start the first period, the Senators got on the board first on a power play of their own.

Tkachuk wristed a pass at the left circle from Drake Batherson and beat Allen glove side to give the Senators a 1-0 lead at 13:38 and break New Jersey’s streak of 17 straight successful penalty kills.

“The crowd was awesome tonight, and I mean, our MVP tonight was Linus Ullmark,” Tkachuk said. “He made some absolutely huge saves, and he was a rock star.”

It was the first time the Senators had scored on the power play in six games.

“We were kind of all over the map in a good way,” Tkachuk said. “Just kind of filling in spots, and I think that just shows the type of players that we are, that we can adapt to any situation.”

The Devils went 0-for-5 on the power play.

“I just think that we didn’t really move well enough and spread them out,” Devils forward Jesper Bratt said. “I think that we played a little too tight. We didn’t really get off the walls. We just kept the pucks going a little too much instead of attacking from the middle of the ice.”

The Devils tied it 1-1 at 18:16. Cody Glass fought through a netfront battle and backhanded the puck from behind the net while falling to Meier, who one-timed it from the right circle past Ullmark.

“You score one goal a game, it’s hard to win,” Bratt said. “I think that it’s obviously something we got to start figuring out, and get our scoring chances up a little bit. I think that we get a lot of shots, but our netfront presence hasn’t really been there.”

The Senators regained the lead 2-1 just 37 seconds into the third period. A Tkachuk shot off the blocker of Allen rebounded to Cozens, who won a netfront battle for the puck and pushed it past Allen.