Washington's Braden Holtby made 41 saves while his opposing goaltender Philadelphia's Steve Mason gave up a goal from 101 feet away as the Capitals beat the Flyers 4-1 on Saturday to take a 2-0 lead in their NHL first-round playoff series.
Tampa Bay improved to 2-0 in its NHL Eastern Conference playoff series against Detroit by beating the Red Wings 5-2 on Friday, spurred by a couple of third-period goals from Tyler Johnson.
Washington frustrated Philadelphia by killing all of their power plays, and beat the Flyers 2-0 on Thursday in the opening game of their NHL Eastern Conference first-round playoff series.
Dallas clinched the NHL's Central Division title and top seed in the Western Conference playoffs by beating Nashville 3-2 on Saturday, finishing two points ahead of divisional rival St. Louis, which lost 5-1 at home against Washington.
Russia replaced its entire U-18 world ice hockey championship team on Friday to "minimize" the risk of testing positive for banned drug meldonium, sports minister Vitaly Mutko said.
Jordie Benn scored the tiebreaking goal with 4:58 to play as the Dallas Stars rallied from a third-period deficit to assert their Western Conference supremacy with a 3-2 victory over the Los Angeles Kings on Saturday.
Phil Kessel scored twice as the surging Pittsburgh Penguins moved within striking distance of a 10th straight playoff berth with a 5-2 win over the Nashville Predators on Thursday night.
Dallas and St. Louis both won in the NHL on Tuesday to keep pace with each other for the Western Conference lead as the regular season winds down.
San Jose clinched a place in the NHL playoffs by beating Los Angles 5-2 on Monday, returning to the postseason after its run of 10 straight appearances ended last year.
Hilary Knight had two goals and Brianna Decker scored the winner to help the United States begin its title defense at the women's world hockey championship with a 3-1 victory over Canada on Monday night.