Game 7 will be in Toronto on Saturday.
"We know all we did was buy ourselves another chance to keep our season going," Point said. "Going into their building, their crowd has been rocking. They play really good there. We just want to focus on a good start and see what happens."
Andrei Vasilevskiy made 30 saves, and Nikita Kucherov, Ondrej Palat and Anthony Cirelli scored for Tampa Bay, the No. 3 seed in the Atlantic Division.
The Lightning are 17-0 in the postseason following a loss since the beginning of the 2020 Stanley Cup Playoffs. The last time they lost two consecutive postseason games was in 2019, when they were swept by the Columbus Blue Jackets in the first round.
"Losing two in a row is never a good thing in the playoffs," defenseman Victor Hedman said. "It's been back and forth the whole series and now we've got to win coming off of a win. It was the best out of seven, then the best out of five, best out of three and now it's the best out of one."
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John Tavares scored twice in 26 seconds in the second period, and Campbell made 31 saves for Toronto, the No. 2 seed in the Atlantic.
"Not a lot between the two teams, which is why you get it to overtime," Maple Leafs coach Sheldon Keefe said. "Loved how we played in overtime. We attacked, we had chances, plenty of opportunities to finish it, and really gave them nothing until they had the look, and they made good on their one look, so that's the difference."
Kucherov scored a power-play goal on a 5-on-3 at 9:20 of the third period to tie it 3-3.
"I've watched [the power play] do it a ton," Lightning coach Jon Cooper said. "You're not going to score every single time, but clearly we needed it there. That was one we needed and 'Kuch' delivered."
Tavares made it 3-2 at 19:52 of the second period, kicking a no-look pass from William Nylander off his skate to his stick and finishing with a snap shot from the slot. The Maple Leafs captain tied it 2-2 at 19:26 with a shot that deflected off Vasilevskiy's pad and went over his back and into the net.
"We just kept on competing, just kept our composure, and we just kept playing," Tavares said. "We worked, got the lead. Unfortunately, it didn't work out where we were able to hold it, but we stayed with it. We kept pushing, finding chances and opportunities. We had looks."