The Washington Capitals shut out the Philadelphia Flyers to open their NHL play-off series with a 2-0 win.
Goaltender Braden Holtby stopped 19 shots as the Caps, the Presidents' Trophy winners, started the Eastern Conference first-round play-off series with a victory.
John Carlson and Jay Beagle scored the goals in the second and third periods respectively at Verizon Center.
A third-period goal from Joe Pavelski helped the San Jose Sharks past the Los Angeles Kings 4-3.
The Sharks rallied from 1-0 down - thanks to Pavelski's first goal - and a 3-2 deficit to earn their win.
Tomas Hertl tied the game late in the second period before Pavelski's match-winner 17 seconds into the third.
The Sharks lead the Western Conference first-round series 1-0, having taken home-ice advantage.
The New York Islanders claimed a thrilling 5-4 win over the Florida Panthers in the Eastern Conference.
John Tavares scored once and provided two assists as the Islanders won the series opener at the BB&T Center.
Things were far more straightforward for the Dallas Stars, who crushed the Minnesota Wild 4-0.
Goals from Radek Faksa, Jason Spezza, Patrick Eaves and Jamie Benn saw the Stars to a comprehensive win and 1-0 series lead in the Western Conference.