OTTAWA - The Rangers could not hold on to a two-goal lead late in regulation and eventually lost in double overtime on Jean-Gabriel Pageau's fourth goal of the night that gave the Senators a 6-5 victory in Game 2 and a 2-0 series lead.
The series resumes Tuesday night at Madison Square Garden.
Pageau broke in on a 2-on-1 and beat Henrik Lundqvist high glove side 2:54 into the second overtime.
"We played well enough to win this game, there's no question about it," Lundqvist said. "It's really tough to lose this one. Clearly they've gotten the bounces here in the first two games.
The Rangers had a 5-3 led that was erased when Pageau scored twice in the final 3:19 of regulation, including the game-tying goal with 1:02 remaining that completed his hat trick.
"They got pucks and bodies to the net and allowed guys time and space there, deflections and stuff," Ryan McDonagh said of the final minutes of regulation. "There's not much Henrik can do there. It's a tough way to lose a game but it doesn't mean the series is over here."
The teams traded goals in the first period before the offense erupted beginning in the second period. Chris Kreider scored his first goal of the postseason at 10:39 and Derek Stepan extended the lead 2:31 later with the Rangers' second short-handed goal of the contest.
Video: NYR@OTT, Gm2: Kreider scores with wrister from circle
Marc Methot answered just 50 seconds later to get the Senators back to with a goal at 3-2 before Brady Skjei sent a seemingly harmless wrist shot on net that found a lane through Craig Anderson 1:51 later that put New York up 4-2 with 4:09 remaining in the middle frame.
Video: NYR@OTT, Gm2: Skjei pots wrister through a screen
Ottawa would not go down quietly, though, as Mark Stone scored 1:28 into the third period to once again make it a one-goal game.
But Skjei had an answer of his own starting in the defensive zone when he broke up a 3-on-1 for Ottawa. The speedster joined a 4-on-2 rush the other way as the late man and Brendan Smith hit him with a pass that he followed with a wrist shot to make it a two-goal game yet again before Pageau tied it late.
Video: NYR@OTT, Gm2: Skjei goes five-hole for his second
Now the Rangers must reset, regroup and prepare for Tuesday's match at The Garden, where they've won two playoff games in a row.
"It's a good thing we have two days here because it might take a full day to let this one go," McDonagh said. "We get an opportunity to practice and get our energy level back and our execution going back and our focus in the right direction leading up to the game.
"Take it one step at a time, one day at a time and our group is not going to give up here," he added. "We're going to come out hard here in our building."