BOSTON — Alex Tuch and Mattias Samuelsson scored in the first period, Zach Benson added another early in the third, and the Buffalo Sabres beat the Boston Bruins 4-1 on Friday night in Game 6 to advance to the second round of the NHL playoffs for the first time since 2007.

Josh Norris added an empty-netter. Alex Lyon finished with 25 saves.

The 4-2 series victory is the latest milestone for Buffalo, which ended its 14-year playoff drought by capturing its first Atlantic Division title. The 2007 season was also the last time the Sabres advanced to the second round. They lost in the conference finals that year.

Buffalo will play the winner of the Montreal-Tampa Bay series in the second round. That series will go to seven games after the Lightning’s 1-0 overtime win Friday night in Montreal.

David Pastrnak scored the lone goal for the Bruins. Jeremy Swayman made 22 stops.

Tempers flared with 1:31 to play after Benson tripped Charlie McAvoy, who crashed awkwardly into the boards. McAvoy responded with a slash at Benson. Both were sent to the penalty box.

It ends a feisty series comeback for the Bruins after earning a playoff berth in their first season under coach Marco Sturm. Boston has lost its last six home playoff games.

Trailing 2-1 in the third, the Bruins picked up their attack and had something working in the Sabres’ zone. But Josh Doan poked the puck away to start a break. He was pursued by Pastrnak and McAvoy toward the corner but flipped it back to a wide-open Benson, who beat Swayman.

The Sabres’ speed dominated in the early going.

That changed 1:54 into the second period when a Buffalo turnover turned into a 2-on-1 break with Pastrnak and Pavel Zacha. Zacha passed to Pastrnak on the left side, and he fired it in from the faceoff circle for his third goal of the series, getting the Bruins within 2-1.

It was part of a second period in which there was an increase in physical play that was mostly allowed by the referees. The teams went more than nine minutes without a stoppage of play.

The Sabres needed just 3:25 into the first period to open the scoring, as Tuch guided in a touch pass in front of the net by Rasmus Dahlin.