Matthews gave Toronto a 1-0 lead 16 seconds into the game. Domi got to a loose puck behind the Washington net and passed in front to Matthews, who scored from just beyond the crease.
“He's such a smart player out there,” Matthews said of Domi. “He makes the game easy, he can make plays, he moves spatially well and just communicates a lot out there, so it just makes it easier on myself and [Tyler Bertuzzi] to move into space and try to find each other. Really liked the chemistry tonight.”
Nylander made it 2-0 at 56 seconds of the second period. He received a pass from Tavares and scored over Lindgren’s left shoulder from the right face-off circle.
Ovechkin pulled the Capitals within 2-1 on the power play at 9:57 with a one-timer from the bottom of the left circle off a pass from John Carlson.
Matthews made it 3-1 at 12:59 when he scored through a screen on a wrist shot from the right point for his NHL-leading 57th goal of the season.
"It's just the response from the next line going out and just trying to set the tone and get the momentum back on our side,” Matthews said. “It's really as simple as that, and when they did close the gap we had a response, which was a good thing to see. We just want to carry that over. These games get more and more important through the stretch.”
Connor McMichael cut it to 3-2 at 13:34. Rasmus Sandin’s shot went off the end boards, and McMichael banked the puck in off Woll from below the goal line.
Matthews appeared to complete the hat trick at 16:42, but the goal was overturned after Washington challenged for offside.
Toronto pushed it to 4-2 at 19:35 when Domi’s shot deflected off Jake McCabe and past Lindgren.
“As soon as we get closer to them, they find a way to add to the lead,” said Ovechkin, the Washington captain. “It’s frustrating.”