(AP) — The second round of the Stanley Cup playoffs will include the top-seeded Washington Capitals after they knocked off the Toronto Maple Leafs in overtime.

Marcus Johansson provided the tying and winning goals as the Capitals pulled out a 2-1 overtime win at Toronto. Johansson ended the six-game series at 6:31 of OT after knotting the score with 7:09 left in regulation.

Neither team scored until Auston Matthews beat Braden Holtby 7:45 into the third period. Holtby stopped 37 shots, while Frederik Andersen made 34 saves.

Five of the six games went into overtime, with the Capitals winning three of them. The other game was a one-goal win by the Capitals, who take on the arch-rival Pittsburgh Penguins in the next round.

The Ottawa Senators have won a playoff series for the first time in four years by ousting the Boston Bruins in six games.

Clarke MacArthur scored a power-play goal 6:30 into overtime to give the Senators a 3-2 win over the Bruins. Bobby Ryan and Kyle Turris scored about five minutes apart early in the second period to put Ottawa ahead 2-1, but Boston forced OT on Patrice Bergeron's goal 1:57 into the third.

Craig Anderson handled 28 shots for the Senators, who will take on the New York Rangers in the second round.

The Bruins have won just one playoff series since reaching the 2013 Stanley Cup finals.

Tuukka Rask stopped 26 shots for Boston.

In other NHL news:

— Penguins forward Chris Kunitz returned to practice on Sunday and wore a non-contact jersey to protect him from a lower-body injury suffered in a March 31 game against the Rangers. The defending Stanley Cup champions are hoping the 37-year-old forward can return to action at some point during the playoffs.

— Ducks All-Star defenseman Cam Fowler is practicing with the Ducks again and could be on target for a quick return to the Stanley Cup contenders' lineup. Fowler has been out since April 4, when Calgary captain Mark Giordano hurt him with an unpenalized knee-on-knee hit.

— The Kings have promoted associate head coach John Stevens to head coach, replacing the recently-fired Darryl Sutter. Stevens also was interim head coach of Los Angeles for four games during the 2011-12 season after going 120-109-34 in three-plus seasons as head coach of the Flyers.