BOSTON — Marco Sturm didn’t know the extent of the injury that knocked Elias Lindholm out of the Bruins’ 4-3 win over the Sabres yet.

The Boston coach expected to get more information on Friday.

“We have to reassess tomorrow,” Sturm said. “I didn’t see the replay yet.”

Lindholm left after a collision with Buffalo center Jordan Greenway near the Bruins’ blue line and crumbled to the ice with 12:40 left in the second. Their legs appeared to collide.

Boston’s first-line center stayed down for a few moments as play was stopped and team medical staff came out to attend to him.

Lindholm was helped to his feet and off the ice with assistance from Charlie McAvoy and Hampus Lindholm. He went immediately down the tunnel to the Boston dressing room.

Lindholm, who has four goals and five

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