Charlie Coyle wasn't thinking about his first goal, which tied things up at the end of regulation.

Or his second, which won it in overtime.

What was weighing on him was the time he coughed up the puck and handed Columbus a goal, even though he redeemed himself by leading host Boston to a 3-2 victory in Game 1 of the Eastern Conference semifinals on Thursday night.

Asked about his two late goals, Coyle said: "I had a costly turnover in the third period. You can't have that during the game.

"I'm just relieved we got the win," he added somberly. "I didn't really care who scored."

Coyle tied the game in the final five minutes of regulation and scored again with 5:15 gone in overtime to help the Bruins take the opener of the best-of-seven series and send Columbus to its first loss of the playoffs.

Tuukka Rask stopped 20 shots for Boston, which took a 1-0 lead on Noel Acciari's short-handed goal in the first period, then fell behind in the third after Brandon Dubinsky and Pierre-Luc Dubois scored in a span of 13 seconds.

"I think we know how to respond to that. We didn't get rattled," Rask said. "We felt like we were going to get it back, and we did."

Coyle tied it when he one-timed a backhanded centering pass from Marcus Johansson into the net with 4:35 left to force overtime. He ended it by deflecting a shot from Johansson into the net.

A native of nearby East Weymouth who was acquired at the trading deadline from the Wild, Coyle said that when he would play street hockey on the cul-de-sac where he lived he used to imagined himself coming through for his hometown team.

"You always think about that stuff," he said. "I'm sure we've all done that. It's pretty cool to be living it."

Coyle is the second Bruin to score a game-tying goal in the last five minutes of regulation and then add the game-winner. Patrice Bergeron did it in Game 7 of the 2013 first round against Toronto.

Western Conference

St. Louis 3, Dallas 2: Vladimir Tarasenko scored two goals and the Blues beat the visiting Stars in the first game of the teams' Western Conference semifinal series.

Robby Fabbri also scored and Jordan Binnington made 27 saves for the Blues, who had lost three of four to Dallas during the regular season.

It was Tarasenko's seventh career multi-goal game in the postseason, tying him with Bernie Federko for second-most in franchise history.

Jason Spezza and Jamie Benn scored for the Stars.

Fabbri gave the Blues a 1-0 lead at 5:57 of the first, beating Ben Bishop between the legs from the right circle. It was his first goal in 25 games, dating to Nov. 23, 2018.