Avalanche 6, Senators 5, OT .

DENVER - Matt Duchene scored his second goal of the game with 2:24 remaining in overtime to lift the Colorado Avalanche to their fifth straight win, 6-5 over the Ottawa Senators on Friday night.

Duchene got hold of the puck in the Avalanche zone and sped down the ice before sending a wrist shot from the lower left circle past goalie Brian Elliott for the winner.

Duchene leaped in the air when he saw the puck go into the net and was soon mobbed on the ice by his teammates after getting the final say in a game that was marked by five ties.

Brandon Yip gave Colorado its first lead of the game at 2:08 of the third, putting a rebound past Elliott for his eighth goal of the season.

But the Avalanche couldn't hold it. With Ottawa on a 5-on-3 power play, Alex Kovalev scored at 4:29 of the third to produce the game's fourth tie. The Senators grabbed the lead again on Daniel Alfredsson's goal at 11:15 of the third before Ryan O'Reilly, charging toward the net, converted a centring pass from Daniel Winnik into another tying goal with 3:13 remaining in regulation.

Duchene put in his 12th goal of the season at 16:55 of the second as Colorado evened the score for the third time on the night. The Avalanche had a two-man advantage on the power play when John-Michael Liles took a shot that glanced off a defenceman's skate toward Duchene, who drove the puck past Elliott.

At 11:39 of the second, Ottawa slipped ahead 3-2 when defenceman Matt Carkner beat goalie Craig Anderson for his first goal of the season. Colorado had pulled into a tie a little more than a minute before when Cody McLeod poked in a loose puck from up close.

The teams ended the first period tied 1-1.

Chris Kelly skated into the Avalanche zone, left a drop pass for Erik Karlsson in the upper right circle and Karlsson fired a wrist shot past the glove of Anderson at 2:14.

TJ Galiardi, in his first game back from a broken right wrist that had sidelined him for 17 games, tied it at 3:55, sending a shot from the right boards that beat Elliott to the glove side. A clearing pass bounced off a referee onto Kevin Shattenkirk, who set up Galiardi's shot.

NOTES: Ottawa completed its sixth set of back-to-back games this season. The Senators beat Minnesota 3-1 Thursday on the front end of the set ... Colorado RW Milan Hejduk missed a fourth consecutive game because of a groin injury and C Paul Stastny sat out with a sore back ... The Senators return home to face the Washington Capitals on Sunday night at Scotiabank Place (7:30 p.m., Sportsnet East, Team 1200).