SUNRISE, Fla. (AP) T.J. Oshie didn't see his go-ahead goal get into the net. The Florida Panthers didn't see this coming, either.
And right away, the top overall seed in the Stanley Cup playoffs finds itself in some trouble.
Oshie scored the go-ahead goal midway through the third period, Vitek Vanecek stopped 30 shots and the Washington Capitals rallied past the top-seeded Panthers 4-2 in the opener of their Eastern Conference first-round series Tuesday night.
''It's one game,'' Capitals coach Peter Laviolette said. ''Our guys played hard tonight. We've got to regroup tomorrow and get back to work.''
Tom Wilson, Evgeny Kuznetsov and Lars Eller also scored for Washington, which trailed 2-1 going into the third period. Teams had been 0-39-1 against Florida in the regular season when trailing after 40 minutes, 0-22-0 when doing so on the Panthers' home ice.
The Capitals must have ignored those numbers. Here's a number not worth ignoring: The last time Florida led a playoff series 1-0 was in 1997, and the Panthers wasted a chance to change that on Tuesday night.
''We let one slip away,'' said Florida defenseman Aaron Ekblad, who returned after missing the final quarter of the regular season with a knee injury. ''I'd like to think we're going to learn a valuable lesson from this.''
Kuznetsov tied the game after a Florida turnover with 11:46 left, then Oshie got behind the defense and tapped Nicklas Backstrom's pinpoint pass by Sergei Bobrovsky for what became the winner 2:23 later.
''Typically Nicky fashion, sauced it through a guy's legs and right on my tape,'' Oshie said. ''I just redirected. Didn't see it go in, so he had to come tell me that we scored. It's always nice to get that go-ahead goal.''
Eller wrapped it up with an empty-netter with 49 seconds left.
Claude Giroux and Sam Bennett scored for Florida. Bobrovsky stopped 34 shots for the Panthers, the Presidents' Trophy winners after an NHL-best 122 points in the regular season - and saw the home-ice advantage slip away in their playoff opener.
Game 2 is Thursday, back in Florida.
''We're still in good spirits,'' Bennett said. ''We still know how good of a team we are. There's no panic in the locker room whatsoever. Everyone's still positive. We'll learn from that game and move on. It's a long series.''
The Panthers argued for an icing call that didn't come on the play where the game got tied. MacKenzie Weegar lost the puck after bouncing into Capitals star Alex Ovechkin near center ice, went down, and Kuznetsov skated in alone on Bobrovsky. He beat him to the stick side, tying the game 2-2 with 11:46 left.
Oshie's go-ahead goal came not long afterward, and Florida never got the equalizer.
''First game, it's always important,'' Vanecek said. ''You feel really good after that.''
Vanecek got the word from Laviolette on the Washington flight to Florida on Monday that he would be starting. Laviolette's message to Vanecek: Be big like Bobrovsky.
And Vanecek delivered.
The Panthers had 340 goals in the regular season and were the NHL's highest-scoring team since Pittsburgh in 1995-96 - which, perhaps coincidentally, was the last (and only) season in which Florida has won a playoff series. The Panthers went to the Stanley Cup final that season, haven't gotten past Round 1 since, and the high-octane offense was largely silenced in Game 1.
The Panthers found themselves on the penalty kill just 49 seconds into the game after Radko Gudas got called for high-sticking, and things worsened when Weegar was hit with a delay of game call to give Washington 1:01 of 5-on-3 hockey.
The two-man disadvantage was killed off. And Florida was one second away from escaping the whole thing unscathed, before Wilson scored at 3:47 to give Washington a 1-0 lead.
But Wilson left the game not long afterward. He returned to the ice during a stoppage in play in the second period, skated a bit as if to test something, then returned to the locker room. He was being evaluated postgame for a lower-body injury.
''Anytime a player doesn't finish a game, there's a concern level with it,'' Laviolette said.
Bennett tied the game late in the first, Giroux made it 2-1 in the second, but the Panthers were blanked the rest of the way.
''It's going to be a lot harder in the playoffs,'' Bennett said. ''We learned that tonight.''
Miami Heat captain Udonis Haslem was among those in the crowd. ... Strange scene midway through the second, when Florida's Mason Marchment was sent to the penalty box, then waved out when officials (correctly) changed their call to a penalty on Washington's Martin Fehervary. ... The penalty on Gudas at 0:49 of the first was the third-fastest opening penalty Florida had committed this season. Jonathan Huberdeau was called for roughing 20 seconds into a game on March 24, Gustav Forsling for hooking 25 seconds into a game on Nov. 27.
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