St. Louis Blues coach Craig Berube sent a veiled shot at Nazem Kadri, after the Colorado Avalanche defeated his team 5-2 to take Game 3 in their playoff series.

Kadri bowled over Blues starting goaltender Jordan Binnington less than seven minutes into the first period, forcing him to leave the game with a lower-body injury.

Binnington, who made three saves in as many attempts to that point, was replaced by Ville Husso, who stopped 19 of 23 shots.

Berube did not overtly blame Kadri for the collision following the defeat, but made reference to his notoriously frenetic and aggressive style.

"Look at Kadri's reputation," Beurbe said post-game. "That's all I've got to say.

"There are a lot of calls you can question. That's hockey. I'm not going to sit here and talk about calls, that weren't called or called, it's just not worth it.

"I can be disappointed but talking about it is not going to change it."

The Western Conference's first seed took a 2-1 series lead on the back of a Artturi Lehkonen brace and 29 saves from Darcy Kuemper.

Kadri, Logan O'Connor and Gabriel Landeskog also scored for the Avalanche, who bounced back from a 4-1 loss on their home ice on Thursday.

The Tampa Bay Lightning's Ross Colton admittedly could not believe his eyes when he scored the winning goal against the Florida Panthers in a 2-1 victory, to take a 2-0 lead in their playoff series.

Colton was called onto the ice with under a minute remaining in the third period and the score locked at 1-1, but abandoned caution and made his way towards the net as Nikita Kucherov retrieved the puck.

Kucherov found Colton as he approached the net with an astonishing backhand, no-look flick off the boards as the Panthers defence converged onto him, leaving Colton with the relatively simple finish to win the game.

Colton's look of near-bewilderment almost said as much but he confirmed his awe at the 28-year-old Russian's assist afterwards.

“I couldn’t believe he [Kucherov] got it on my stick,” Colton said. “I think when we went in the corner, I just said, ‘Are you kidding me?’ like 10 times because I honestly couldn’t believe he put it on my stick.

"When you’re on the ice with Kuch, you’ve got to be ready for anything. He’s got eyes in the back of his head, because I don’t even know how he could tell I was there."

The Lightning were relentless defensively against one of the NHL's best attacking teams this season, snuffing out four Panthers power plays, including one with under five minutes remaining.

While singling out Kucherov as a "special, special player", Lightning coach Jon Cooper asserted the defensive performance and ability to snatch games in clutch moments was a reflection of the team's character.

“No, I’m not surprised,” Cooper said. “I’m just surprised they waited until 3.8 seconds left to do it.”

In Thursday's other result, the St. Louis Blues evened up their series with the Colorado Avalanche, winning 4-1.

Goaltender Andrei Vasilevskiy was the hero as the Tampa Bay Lightning boosted their three-peat bid by winning 4-1 over the Florida Panthers in Game 1 in second round of the Stanley Cup playoffs.

The Lightning beat the Panthers in the first round of last year's playoffs 4-2 after going 2-0 up in the series and Tuesday's win got them halfway there in this year's Eastern Conference semi-finals.

Tampa Bay coach Jon Cooper was full of praise for 27-year-old Vasilevskiy, who made 34 saves as the Lightning fired in three third-period goals to get the win.

Vasilevskiy's 34 saves are the most he has had in a game this postseason, while he has stopped 94 of 99 shots over the past three games.

"Look at the saves he makes at the times we need them," said Cooper in his 124th playoff game with the Lightning.

"To me, that's what great goaltenders do and they give you a chance to win a hockey game and that’s what our guy did again tonight."

Nikita Kucherov, who scored a goal and had an assist, also hailed the Russian goaltender.

"He brings 100 per cent effort every single game and everybody's just trying to take his energy and bring it to your game," Kucherov said.

"He's a leader ... he's our best player."

Florida had taken the lead through Anthony Duclair in the first period but the Lightning hit back with four unanswered goals from Corey Perry, Pierre-Edouard Bellemare, Kucherov and Ross Colton to take the win.

"We're still learning and unfortunately we had to learn again tonight. We will be better next game," Florida interim coach Andrew Brunette said.

"They are too good of a team, a veteran team, and they're not going to open the door for you. We had our opportunities. On to the next game."

Star winger Artemi Panarin proved the difference in Game 7 for the New York Rangers, with his goal in overtime clinching a 4-3 win and the series on Sunday.

Overtime seemed fitting for what has been such a tight series, and the 30-year-old Russian put the Rangers up in rare circumstances, shooting through a wall of Penguins players in a power-play to score.

It was the third-straight come-from-behind victory in the series for New York, who tied the game with 5:45 left in regulation via Mika Zibanejad.

Rangers coach Gerard Gallant felt the conditions did not suit Panarin but he had the requisite skill to save his side when it mattered most.

"He's the guy, when it gets to overtime, I said to myself that he was going to score," Gallant said after the win. "If we get the winning goal, it's going to be him. Sure enough, he makes a great play.

"You know what? Honestly, the ice wasn't great tonight. The puck was bouncing and it affects his game more than the other guys. People get frustrated at times. I think we saw a little of that.

"I just thought he wasn't having his best night. He tried hard, he competed and got some pucks out. He usually makes a lot of plays and tonight it just wasn't there, but you just get a feeling with a guy like him that he can do that for you. And that's what he does."

The Penguins were bolstered by the return of Sidney Crosby after he missed Game 6 with an upper-body injury, caused by a hit from Jacob Trouba. The visitors equalised on a power-play following a penalty for high-sticking from Trouba and though they hit the lead, could not manage to see the series out.

In Sunday's other result, Johnny Gaudreau's goal in overtime secured the series for the Calgary Flames against the Dallas Stars, moving to the second round with a 3-2 win.

Nick Paul scored twice, including a stunning individual goal late in the second period, as the Tampa Bay Lightning defeated the Toronto Maple Leafs 2-1 in Game 7 on Saturday.

The two-time defending Stanley Cup champions came from a goal down in the previous two games, and had to do it again on the road at the Scotiabank Arena after Thursday's overtime win to level the series.

Morgan Reilly scored for Toronto but Andrei Vasilevskiy stopped an eventual 29 shots to keep the Lightning in the game, before Paul's brace secured the series win.

The Leafs were condemned to their seventh consecutive playoff series loss, and have not made the second round since 2004. After the match, Leafs head coach Sheldon Keefe commended the reigning champions on their series win.

"They [Tampa Bay] don’t get a lot of credit because you don’t really think of them this way, but we knew coming into this series that going into third periods down against this team was going to be a challenge," he said post-game.

"They are the number-one team in the NHL when it comes to limiting chances against when up a goal in the third period. All regular season, they were that.

"That is sort of the hallmark of their success. That is championship hockey. They didn’t give us a great deal in that third period tonight. Those are the things I take away - just how hard they defend and how they prioritise defending."

In Saturday's other results, the Carolina Hurricanes won their series-deciding game at home to the Boston Bruins 3-2, while the Edmonton Oilers claimed Game 7 against the Los Angeles Kings with a 2-0 win.

Brayden Point scored the winning goal in overtime and forced a Game 7, as the Tampa Bay Lightning secured a thrilling 4-3 victory over the Toronto Maple Leafs on Thursday.

Ondrej Palat, Anthony Cirelli and Nikita Kucherov also scored for the reigning Stanley Cup champions, but they had to battle until 1:56 remaining in overtime for Point's sealer.

The Lightning had to fight their way back from 3-2 down in the final period with their season on the line, after Leafs captain John Tavares scored twice in the second period's closing 34 seconds.

With his side dropping a lead for the second straight game, Tavares said the focus is now on regrouping as the series heads back to Toronto for the decider.

"We worked hard all year to earn home ice and we've got a great opportunity going home in front of our fans to try to close this thing out," he said.

"So just regroup here, and look forward to the opportunity. This is what the game's all about."

The Boston Bruins also forced a Game 7 after they defeated the Carolina Hurricanes 5-2, while the St. Louis Blues advanced to the second round, beating the Minnesota Wild 5-1 in Game 6.

In Thursday's final game, the Edmonton Oilers evened their series up with the Los Angeles Kings in Game 6, winning 4-2.

Tampa Bay Lightning head coach Jon Cooper says his side were motivated to win before the group likely breaks up this offseason after lifting the Stanley Cup on Wednesday.

The Lightning won 1-0 over the Montreal Canadiens at Tampa's Amalie Arena to clinch a 4-1 Stanley Cup Finals triumph, lifting the trophy for the third time in franchise history.

Ross Colton, who along with David Savard has been linked with an offseason move away from Tampa, scored the only goal of the game in the second period to seal the back-to-back Stanley Cup triumphs.

"We didn’t talk about it publicly, the team knows they are probably not going to be together next year," Cooper said post-game.

"It was led by Ryan McDonagh, [Patrick] Maroon and [David] Savard, that was the conservation, 'don’t let this end, it's too special a group'.

"They weren’t going to go out without raising the trophy."

The Lightning's domination in recent years has seen them not lose consecutive playoff games since the first round of the 2019 series.

Cooper added: "It's a culmination of your whole life's work. Character that can trump skill. This group has it, gamers all over the place. The players did it. I just sat their chewing gum."

Maroon earned special praise, as he celebrated lifting his third consecutive Stanley Cup, after the left-winger triumphed with the St Louis Blues in 2018-19.

"This was one special," Maroon said. "It's hard to win. [I'm] Blessed to be a part of good teams.

"It's hard to go back-to-back. To be a part of a group that's so special, it's really good.

"You can put me in some good company. I'm truly blessed."

The Tampa Bay Lightning were served with a warning by head coach Jon Cooper after launching their Stanley Cup Finals mission with a 5-1 win over the Montreal Canadiens.

Cooper said his team still had a heap of work to do if they are to clinch back-to-back titles, and borrowed a string of baseball metaphors as he spoke of potential "curveballs" to come.

Two goals and an assist from Nikita Kucherov helped the Lightning to their comprehensive win in Game 1 at Amalie Arena.

Kucherov now has 30 points in the Stanley Cup playoffs for a second straight year, after seven goals and 23 assists. He has 64 points across this season and the previous campaign in the playoffs, a total only ever surpassed in successive playoff campaigns by Wayne Gretzky and Mario Lemieux.

The Russian became just the fifth player in NHL history to achieve multiple 30-point playoff campaigns, following Gretzky (six), Mark Messier (three), Jari Kurri (two) and Lemieux (two).

Cooper sounded a note of caution though, dialling down the euphoria and saying in his post-game news conference: "Consistency is the key.

"You have your plan, you stick with it and you consistently rock it, and if you do that we like our chances in games, but it doesn't guarantee results.

"For us we have found something that works with us. It doesn't mean you're going to win every night, but it's sticking with that process.

"You look no further than the last series we played in."

That was the semi-final against the New York Islanders that went all the way to the seventh game, the Lighting taking a 1-0 win in that decider.

"Teams in this league push you to the brink," Cooper said. "You have to hang in there and stick with it and this group has found a way to do that.

"You're not going to win a series in one night. There's curveballs and sliders and fastballs, and they're all thrown at you at different times, but if you're consistent with your game we trust that good things will happen.

"Tonight was just one, but the series is long from over. We're happy with tonight and now we're just going to improve on what we're doing and try and replicate it in Game 2."

That second game comes on Wednesday night, also in Tampa.

Canadiens assistant coach Luke Richardson, leading the team in the continuing absence of Dominique Ducharme who tested positive for COVID-19 earlier this month, expects a tighter battle next time.

Richardson said: "The rink was buzzing, and that's something that we will get over and we'll be a little bit more used to next game.

"I think maybe just to strike early for us will be key next game, to try and weather that storm and quiet the building a little bit and let us get a rhythm going."

Toronto Maple Leafs captain John Tavares has been discharged from hospital following a head injury suffered on Thursday that will see him out indefinitely.

Off balance following a collision, a prone Tavares was caught by the knee of passing Montreal Canadiens winger Corey Perry during the opening game of the playoff series.

Tavares initially rose to his knees before then slipping back down to the ice. He was taken from the rink on a stretcher, though did offer a thumbs-up upon his departure midway through the first period.

The Leafs announced on Friday that, following thorough checks, the 30-year-old was cleared to return home and rest. There is no timetable for his return to action, though.

"Toronto Maple Leafs captain John Tavares has been discharged from hospital this morning," read a statement released by the team via social media.

"He was thoroughly examined and assessed by the neurosurgical team at St Michael’s Hospital and the club's medical director.

"He was kept overnight for observation and is now resting at home under the care and supervision of team physicians.

"Tavares will be out indefinitely."

The Maple Leafs lost 2-1 at the start of the best-of-seven series in the first round of the Stanley Cup playoffs. Game two takes place in Toronto on Saturday.

Tavares had 19 goals and 31 assists in the regular season, helping his team finish top of the North Division. He has 819 points in his NHL career, having previously played for the New York Islanders.