Matias Maccelli scored for the Islanders (3-3-1), who have alternated wins and losses through their first seven games. Semyon Varlamov made 18 saves.
“First off, you know, huge game by our goaltender,” New York coach Peter DeBoer said. “Again, I can't say enough about his journey and what he's done to get here, and then what he did tonight, so good to see. I think everyone wished we could have won one for him, but he was outstanding.”
Warren Foegele appeared to give Ottawa a 1-0 lead at 4:50 of the first period. However, after ruling his shot a goal on the ice, a video review determined that the puck hit off the crossbar after glancing off the shoulder of Varlamov.
Stephen Halliday then appeared to score for the Senators at 11:54, but the Islanders challenged the play for offside, and the call was overturned after another video review.
“I don’t even want to focus on those things,” Varlamov said. “Goals, not goals, they didn’t score. And it was 0-0 and we came back.”
Maccelli did score for New York with 12 seconds remaining in the period to make it 1-0. He stole the puck from Pinto just inside the blue line, skated to the top of the right circle, and beat Ullmark glove side with a wrist shot.