"Obviously you always hope for those," said Granlund, who scored his first goal in 16 games since Nov. 29.
He intercepted the puck in the right faceoff circle and cut across the slot, patiently holding onto the puck before scoring on a wrist shot from the left side of the net to give the Wild a 1-0 lead.
"It was a fairly sloppy game overall," Boudreau said. "It seemed like the ice was so fast that the puck was spinning like a curling rock every time it hit somebody's stick. I mean the best pass was the one they gave (Granlund)."
Granlund has 13 points (three goals, 10 assists) during an eight-game point streak against Montreal.
"It was just a mistake, I should have used the boards," Petry said. "I thought that I saw where Mike (Reilly) was and put it right in the middle and I should have just sucked the forecheck in a little more and used an indirect instead of trying to make a direct pass."
Canadiens defenseman Shea Weber was struck on the left side of the face by a shot by Granlund at 5:53 of the first. The Montreal captain remained in the game through the end of the period but did not return for the second.
Weber went to the hospital for X-rays, which revealed no fracture. Canadiens coach Claude Julien could not confirm if he will play against the Detroit Red Wings on Tuesday, though he will make the trip.
Minnesota forward Eric Fehr left and did not return after he fell into the boards when he was checked by Kenny Agostino, who got a major penalty for interference and a game misconduct at 2:28 of the first.
Boudreau had no update on Fehr's status after the game.
