Andrei Vasilevskiy made 25 saves for the Lightning (19-6-4), who have won seven of their past eight games. Vasilevskiy set an NHL record with his 63rd win of the calendar year. He is 63-21-4 in 2021, including regular-season and Stanley Cup Playoff games. Marc-Andre Fleury was 62-30-6 in 2009 with the Pittsburgh Penguins.
"We're just sliding under the radar, which is fine for us," Tampa Bay captain Steven Stamkos said. "Probably a little weird being a defending back-to-back Stanley Cup champion and we're just sliding under the radar. It's great for us."
"We kind of joke that we're the 'Tampa Bay Find-A-Ways.'" We just find a way to win, find a way to get points and just munch them away until we get healthy."
Thomas Chabot scored for the Senators (9-17-1), and Anton Forsberg made 25 saves but had his five-game winning streak end.
"I thought we played real hard," Ottawa coach D.J. Smith said. "I thought we had plenty of chances, especially in the second period. Obviously five penalties, they score one and that's the difference here tonight.
"You'd like to get a point. We had some guys that were a little bit flat, but defensively we worked hard and blocked shots and did everything we could to give ourselves a chance to win."