PITTSBURGH (AP) ― The Ottawa Senators know there is little margin for error if they want to upset the Pittsburgh Penguins.

If they don’t slow down Pittsburgh’s potent power play, they’ll have a difficult time against Sidney Crosby and the rest of the Penguins.

Paul Martin and Chris Kunitz scored power-play goals and Pascal Dupuis added his sixth goal of the playoffs and the Penguins beat the Senators 4-1 in Game 1 of the Eastern Conference semifinals.

Kings 2, Sharks 0

LOS ANGELES (AP) ― Jonathan Quick made 35 saves in his sixth career playoff shutout, and the Los Angeles Kings opened their second-round series with a 2-0 victory over the San Jose Sharks.

Slava Voynov and Mike Richards each had a goal and an assist in the defending Stanley Cup champions’ 11th straight victory at Staples Center since March.

With yet another dominant playoff performance by Quick, Los Angeles opened the NHL’s fourth all-California playoff series with its fifth straight victory after an 0-2 start to its title defense.