"Without a doubt [he was great]," Vigneault said of Raanta. "He was real good; he made some key saves at the right time and guys played real hard for him."
Raanta played the third period on Thursday in a 4-1 loss to the Pittsburgh Penguins after Lundqvist left the game with neck spasms.
It was the Rangers' 10th consecutive victory following a regulation loss; they have 12 straight wins following a regulation loss or overtime loss. The streak began with a 3-2 victory against the Anaheim Ducks on Dec. 22. According to the Elias Sports Bureau, the Rangers' 10-game winning streak in games following a regulation loss is the longest within one season in franchise history. The Rangers have not lost two consecutive games (regulation and OT losses included) since losing three straight from Dec. 17-Dec. 20.
Stepan broke a 2-2 tie when his shot from the high slot deflected off the skate of Capitals defenseman Brooks Orpik and went past goaltender Braden Holtby. It was Stepan's 15th goal of the season.
"He's supposed to be one of our go-to guys and he's played in important games and he knows that he's got to step it up," Vigneault said of Stepan. "The teams that win are getting good goaltending and obviously solid play from their top players and [Stepan] is one of ours."
Forwards Jesper Fast and defenseman Keith Yandle scored in the first period for the Rangers (38-21-6), who are second in the Metropolitan Division, five points ahead of the third-place New York Islanders. The teams play Sunday at Madison Square Garden.
Forwards Jay Beagle and T.J. Oshie scored in the second period, and Holtby made 20 saves for Washington (47-13-4), which plays at the Boston Bruins on Saturday.
"I thought we played the right way," Capitals coach Barry Trotz said. "As I said to the guys after the game, 'I'll take that game any day of the week.'"
Fast opened the scoring at 5:47 of the first period. The Capitals couldn't clear a flurry in front of the net and Fast put a rebound past Holtby for his ninth goal of the season.
The Capitals have allowed the first goal in nine of their past 11 games.