The Pittsburgh Penguins have rallied to record a 4-3 victory over the Buffalo Sabres in the NHL, having earlier thrown away a 2-0 lead.
Pittsburgh flew out of the blocks, with Pascal Dupuis and Sidney Crosby both scoring in the opening two minutes before the Sabres pegged the visitors back with a goal in each period to take the lead five minutes and 17 seconds into the third term.
But Crosby inspired the Penguins to their third victory in a row, creating the visitors' two third-period goals, including the winner with just over two minutes remaining on Sunday.
Buffalo took the lead in the third period's sixth minute when Steve Ott scored but two minutes later Pittsburgh hit back with Crosby and Kris Letang setting up Dupuis to take the score to 3-3.
Crosby and Dupuis then combined to tee-up Paul Martin in the 18th minute, and he smashed the puck home to take the Penguins to the top of the Atlantic Division, one point ahead of the New Jersey Devils.
In Chicago, the Central Division-leading Blackhawks continued the poor start of reigning Stanley Cup champions the Los Angeles Kings, with the home side winning 3-2 at the United Centre.
The Blackhawks jumped out to a 3-0 lead by the first minute of the second period and then held on late in the match as the Kings stormed home.
LA centre Mike Richards scored twice in the third period to give his team some hope of victory but Chicago goaltender Ray Emery made a handful of late saves to keep the home side ahead.
Brent Seabrook and Jonathan Toews were the other key players for the Blackhawks with a goal and an assist each.
Chicago extended their lead to eight points ahead of the Nashville Predators in the Central Division, while the Kings remain bottom of the Pacific.
The Boston Bruins moved ahead of the Montreal Canadiens in the Northeast Division with a come-from-behind 3-2 win away to the Winnipeg Jets.
In a frantic second period, Winnipeg and Boston traded goals with the Bruins equalising at 2-2 thanks to Daniel Paille's goal just two seconds before the final break.
The away team eventually claimed the win through Brad Marchand's power-play goal in the first minute of the third period.
Boston moved to 20 points, one ahead of the Canadiens, while Toronto are third in the Northeast with 18.
In other NHL results, the New York Rangers defeated the Washington Capitals 2-1 and the St Louis Blues overcame the Vancouver Canucks 4-3 in a shootout.
The Minnesota Wild triumphed against the Detroit Red Wings 3-2, and the Calgary Flames knocked off the Dallas Stars 4-3.