Sean Bergenheim scored two goals and Dwayne Roloson stopped 33 shots last night as the Lightning completed a second-round series sweep of the top-seeded Capitals with a 5-3 victory in Game 4 at Tampa.

Playing on consecutive nights for the first time this postseason, the Lightning extended their winning streak to seven games and advanced to the Eastern Conference finals for the first time since their 2004 Stanley Cup championship season.

For Alex Ovechkin and the Capitals, it was yet another bitter postseason disappointment.

Rookie Michal Neuvirth stopped 32 shots for Washington, but Bergenheim scored twice in eight minutes during the second period to build a 3-1 lead that induced chants of “sweep, sweep, sweep” from a sellout crowd of 20,835.

Marco Sturm, John Erskine and John Carlson scored for the Capitals.

Sharks 4, Red Wings 3 (OT)

In Detroit, Devin Setoguchi scored 9:21 into overtime to finish a hat trick as San Jose took a 3-0 lead in the Western Conference semifinals.

San Jose’s Dan Boyle scored the tying goal with 4:08 left in regulation, setting up the Sharks’ second overtime win of the series. Pavel Datsyuk scored a go-ahead goal late in the second period, but Detroit couldn’t hold on.

Bruins 5, Flyers 1

In Boston, Zdeno Chara and David Krejci scored in the opening 63 seconds, and the Bruins added two more goals in a 95-second span in the second period to beat the Flyers and take a 3-0 lead in the Eastern Conference semifinals.

One year after watching their 3-0 series lead disappear in a historic collapse, the Bruins again moved one game from sweeping Philadelphia in the conference semis. This year they have a chance to do it at home, with Game 4 tomorrow night at TD Garden.