The Denver Nuggets cruised to an 11-point win over a lacklustre Miami Heat in the first game of the NBA finals.

Nuggets centre Nikola Jokic was pivotal in the 104-93 victory, picking up a seamless triple-double in his finals debut.

Miami had no defensive answers for the 28-year-old Serbian, who orchestrated Denver’s offence before finishing with 27 points, 14 assists and 10 rebounds.

Outside of the first few minutes, Denver never looked like losing – much to the appreciation of a raucous home crowd.

Bam Adebayo had a strong showing for the Heat as he picked up a team-high 26 points, but he had little help from an inconsistent offence.

On the other hand, Jokic was ably assisted by a 26-point effort from Jamal Murray, while fellow starters Aaron Gordon and Michael Porter Jr added 16 and 14 points respectively.

The seven-game series is Denver’s first trip back to the finals in 47 years, while Miami are on the hunt for their fourth championship.

The Denver Nuggets didn’t show much rust despite a lengthy layoff and Nikola Jokic stepped up down the stretch in his NBA Finals debut, helping his team hold off the Miami Heat for a 104-93 victory in Game 1 on Thursday.

Jokic scored 12 of his 27 points in the fourth quarter – including eight in the final four minutes after the Heat stormed back to cut a 24-point deficit to just nine points.

The two-time league MVP also assisted on 14 baskets and grabbed 10 rebounds to notch his ninth triple-double of this year’s playoffs.

Jokic had plenty of help with Jamal Murray finishing with 26 points and 10 assists, Aaron Gordon adding 16 points and six rebounds and Michael Porter Jr. chipping in 14 points and 12 boards for a Nuggets team that improved to 9-0 at home in the playoffs.

 The Heat were led by Bam Adebayo’s 26 points and 13 rebounds, while Gabe Vincent scored 19 and Haywood Highsmith had 18 points off the bench.

Jimmy Butler, the MVP of the Eastern Conference finals, had 13 points – his fewest of the playoffs – along with seven rebounds and seven assists.

With nine days off between games after sweeping the Los Angeles Lakers in the Western Conference finals, there was concern that the Nuggets would be a bit rusty, but that wasn’t the case.

Playing in its first Finals in the franchise's 47-year history, Denver came out firing on all cylinders early in front of a raucous crowd, shooting 59.5 per cent in the opening two quarters to jump out to a 59-42 half-time lead.

The Nuggets pulled away in the third quarter to build an 84-60 advantage but the battle-tested Heat responded.

Highsmith scored 12 points in the fourth quarter and his 3 with 2 ½ minutes to play pulled the Heat within nine points, but that is as close as they would get.

Game 2 will be Sunday in Denver, and it’s possible Tyler Herro will be cleared to play.

Herro has been sidelined since fracturing his right hand in Miami’s playoff opener on April 16, and has been increasing his basketball activities in the last week.

Jayson Tatum lamented an untimely injury while Grant Williams bluntly said the Boston Celtics "got punked" after their defeat to the Miami Heat.

The Celtics fell short of becoming the first team in NBA history to win a seven-game series after going 3-0 down, as the Heat ended their season with a 103-84 win in Boston.

With talisman Tatum hampered by an ankle injury that he sustained on the first play of Monday's game, the Celtics could not get going as Jimmy Butler led the Heat to the NBA Finals.

Tatum finished with 14 points on 5-for-13 shooting, and was left to reflect on a missed opportunity.

"It was just frustrating that I was a shell of myself," Tatum said.

"It was tough to move. Just frustrating, with it happening on the first play."

Williams' assessment was a blunt one.

"We got punked," the Celtics forward told ESPN.

 "We didn't play our game from start to finish. Defensively, we just lost it all, and then offensively we were scrambled and trying to do everything ourselves and just didn't go our way.

"You hate to have that be the end of your season, especially with the fight that we've shown. But shots didn't fall either, so that didn't help. It's just tough."

"[We were] missing shots, and then they're coming down and hitting shots," added Marcus Smart.

"It puts a lot of pressure on our defense to get stops. They were hitting some shots and they got in a rhythm and we weren't making ours."

Erik Spoelstra hailed the "intimate" and "raw" relationships within the Miami Heat's roster after his team overcame the Boston Celtics to reach the NBA Finals.

The Heat had squandered a 3-0 lead in the Eastern Conference finals, but Game 7 went their way in emphatic fashion.

Jimmy Butler led Miami with 28 points as the Heat won 103-84, ending the Celtics' bid at history in the process.

Boston was aiming to become the first team to win a seven-game series after losing the opening three encounters, but it was not to be.

"It wasn't scripted," Spoelstra told reporters.

"When you have such an intimate relationship with a locker room and they have it with each other, the staff has it with them, they have it with the staff, sometimes it's just whatever's raw, whatever's real at that time.

"Professional sports is just kind of a reflection sometimes of life, that things don't always go your way.

"The inevitable setbacks happen and it's how you deal with that collectively. There's a lot of different ways that it can go. It can sap your spirit. It can take a team down for whatever reason.

"With this group, it's steeled us and made us closer and made us tougher.

"These are lessons that hopefully we can pass along to our children, that you can develop this fortitude.

"Sometimes you have to suffer for the things that you want. Game 6, the only thing that we can do is sometimes you have to laugh at the things that make you cry."

The Heat are only the second No. 8 seed in NBA history to make the Finals, after the 1999 New York Knicks.

Butler was named the Eastern Conference finals MVP, and has full confidence the Heat can go all the way against the Denver Nuggets.

"I just know why coach Pat [Riley] and coach Spoelstra wanted me to be here," Butler said. "That's to compete at a high level and to win championships.

"I know that the group that they put around me at all times is going to give me an opportunity to do so.

"I know the work that we all put into it, so I know what we're capable of. Nobody is satisfied. We haven't done anything. We don't play just to win the Eastern Conference; we play to win the whole thing."

Spoelstra reserved special praise for the Heat's talisman.

"There's no way to quantify the confidence that he can instil in everybody. Jimmy has never had to apologise," Spoelstra said of Butler.

"I don't want him to ever apologise for who he is and how he approaches competition. It's intense. It's not for everybody, and we're not for everybody.

"That's why we think it's like an incredible marriage. We never judge him on that. He doesn't judge us for how crazy we get. It's the same language. But the confidence level that he can create for everybody on the roster is incredible.

"He's gnarly, but he knows how to have a soft touch to give somebody some confidence at the right time. That's the special gift that he has."

Boston Celtics hero Derrick White said "It just had to be won" after his buzzer-beating tip-in forced the Eastern Conference finals to Game 7, as Jayson Tatum added: "That s*** was crazy!"

From 3-0 down against the Miami Heat, the Celtics have fought back to 3-3 in the series, and are now just one win away from making history.

White grabbed and then sank the rebound from Marcus Smart's failed three-pointer with 0.1 seconds remaining to seal a 104-103 victory in Miami on Saturday.

The Celtics are now on the brink of the greatest comeback in NBA playoffs history, needing a win at home in Game 7 on Monday to become the first team to win a series after losing the first three games.

Boston are only the fourth NBA team to erase a 3-0 deficit in a best-of-seven series to force a deciding game.

Reflecting on the game-winning moment, Tatum told reporters: "I'm still, like, in disbelief. That s*** was crazy.

"That felt like the longest 10 seconds ever waiting for confirmation if he made it or not."

White told TNT: "It had to be won. Whatever it takes, our backs against our wall, it just had to be won.

"We're a resilient group. We pick each other up, we bond for each other.

"The job isn't done yet, we've got a tough one Game 7, we've got to find a way to get one more win."

White had tears sparkling in his eyes, but explained: "I'm just happy. So far, so good."

It is just the second time in league history that a player has hit a buzzer-beater when his team was down and facing elimination, after Michael Jordan's legendary "The Shot", way back in 1989.

"Derrick White, like a flash of lightning, just came out of nowhere and saved the day, man," team-mate Jaylen Brown added. "An incredible play."

The Heat can only lick their wounds as they head to Boston for Monday's winner-takes-all matchup.

Heat coach Erik Spoelstra said: "It's a seven-game series. There's nothing better than Game 7s.

"I don't know how we're going to get this done, but we're going to go out there and get it done, and that's what the next 48 hours is about.

"There's been nothing easy about this season for our group, and so we just have to do it the hard way."

Jimmy Butler did his best for Miami, with 24 points, 11 rebounds and eight assists.

"We've got to go on the road and do something special, but we've got a special group," Butler said.

Derrick White put home Marcus Smart's missed three-pointer just before the final buzzer sounded to give the Boston Celtics a thrilling 104-103 victory over the Miami Heat to force Game 7 in the Eastern Conference finals.

After Jimmy Butler sank three free throws to give Miami a 103-102 lead with three seconds left, the Celtics inbounded to Smart, whose three-pointer rattled in and out.

But White grabbed the rebound and released it with 0.1 seconds on the clock to save Boston's season.

The Celtics are on the brink of the greatest comeback in NBA playoffs history, needing a win at home in Game 7 on Monday to become the first team to rally to win a series after losing the first three games.

Boston are only the fourth NBA team to erase a 3-0 deficit in a best-of-seven series to force a deciding game.

Monday's winner will face the Denver Nuggets in a title series that will start on June 1.

Jayson Tatum had 31 points and 10 rebounds, Jaylen Brown added 26 and 10 boards and Smart finished with 21 points as the Celtics improved to 5-0 when facing elimination this season.

Butler scored 12 of his 24 points in the fourth quarter to go with 11 rebounds and eight assists.

The Heat need a win Monday to become only the second number eight seed to make the NBA Finals and avoid the dubious distinction of being the first team to blow a 3-0 series lead.

Jimmy Butler is confident the Miami Heat will rediscover their form as they aim to clinch a place in the NBA Finals.

Miami lost 110-97 to the Boston Celtics on Thursday in Game 5 of the Eastern Conference finals, cutting their lead in the series to 3-2.

Boston head into Game 6 within two wins of making NBA history – no team has ever come from 3-0 down to win a seven-game series.

Butler, though, still has faith the Heat will join the Denver Nuggets in the Finals.

"The last two games are not who we are," he said. "It just happened to be that way.

"We stopped playing defense halfway because we didn't make shots that we want to make. But that's easily correctable.

"You just have to come out and play harder from the jump. Like I always say, it's going to be all smiles, and we are going to keep it very, very, very consistent, knowing that we are going to win next game.

"We've just got to play better. Start the game off better, on the starters, make it more difficult for them.

"They are in a rhythm since the beginning of the game. But we are always going to stay positive, knowing that we can and we will win this series. We'll just have to close it out at home."

Heat coach Erik Spoelstra, meanwhile, was in bullish form when he spoke to the media.

"Who cares about mood?" Spoelstra said.

"We have a gnarly group. I think so much of that is overrated. It's a competitive series. You always expect things to be challenging in the conference finals.

"One game doesn't lead to the next game. Based on all the experience that we've had, it doesn't matter in the playoffs. It doesn't matter if you lose by whatever.

"We beat them by whatever in Game 3. It just doesn't matter. It's about collectively preparing and putting together a great game. We'll play much better on Saturday. That's all we just have to focus on right now."

Jaylen Brown hailed the Boston Celtics' unity after they beat the Miami Heat 110-97 to force Game 6 in the Eastern Conference finals.

Having staved off elimination with a win in Game 4, the Celtics never trailed in Game 5 on Thursday as they cut Miami's lead to 3-2.

Boston will now aim to level the series in Miami on Saturday. Should they complete a remarkable turnaround, they will be the first team in NBA history to rally from a 3-0 deficit in a best-of-seven series, after 150 previous sides failed to do so.

Brown, who contributed 21 points to Celtics' total, explained the team could not have been at a lower ebb after losing the first three games of the series.

"Our back has been against the wall. Obviously, we didn't imagine being in this position, being down 3-0, but when adversity hits, you get to see what a team is really made of," he said.

"It couldn't get worse than being down 3-0, but we didn't look around, we didn't go in separate directions. We stayed together."

Only three teams have managed to take a series to Game 7 after losing the opening three games, the last of which was the Portland Trail Blazers in 2003.

"For some odd reason, even last year, we always seemed to make it a little bit tougher on ourselves," added Jayson Tatum, who had a double-double of 21 points and 11 assists.

"What I do know is that you can see the true character of a person, of a team, when things aren't going well, and our ability to come together, figure things out when it's not necessarily looking good for us.

"It's unlike any team I've been on this year and last year, just the core group of guys being able to respond.

"I think that's just a testament to our togetherness, obviously how bad we want it, and we've got a room full of determined, tough guys that push comes to shove, you look to the left and the right of you, believe that the guy next to you is going to do whatever it takes and go down fighting if it doesn't work out."

Looking ahead to Game 6, Brown is under no illusions of the scale of the task at hand.

"It's going to take everything," he said.

"It's going to be a dogfight. I imagine those guys will play better than they played tonight, and they're going to come out aggressive. We've got to be ready to take their punch at home. We've got to be ready to be resilient and come out and do what we're supposed to do."

Derrick White led with 24 points and the Boston Celtics never trailed in a 110-97 win over the Miami Heat on Thursday to stave off elimination and force Game 6 in the Eastern Conference finals.

Boston scored 20 of the game's first 25 points and held a comfortable lead the rest of the way to cut the series deficit to 3-2.

The Celtics will try to prolong their season again when the series moves back to Miami for Game 6 on Saturday.

They are two wins away from becoming the first team in NBA history to rally from a 3-0 deficit in a best-of-seven series after 150 previous teams failed to do so.

Marcus Smart had 23 points and Jayson Tatum and Jaylen Brown added 21 apiece in Boston's second consecutive strong shooting performance.

The Celtics shot over 50 percent from the field and were 16 of 39 from 3-point range, including White going 6 of 8.

Boston are 34 of 84 from deep the past two games after going 31 for 106 in the first three games of the series.

Duncan Robinson led Miami with 18 points off the bench, while Jimmy Butler was held to 14 - his lowest total of the postseason.

The Heat committed 10 first-half turnovers and trailed 61-44 at the break.

Miami point guard Gabe Vincent sat out with a sprained left ankle and was replaced in the starting lineup by Kyle Lowry, who had five points and four turnovers in 30 minutes.

The Miami Heat’s mission to reach the NBA Finals has become a bit tougher, as starting guard Gabe Vincent has been ruled out for Thursday’s Game 5 of the Eastern Conference finals against the Boston Celtics because of a sprained left ankle.

Vincent was injured with just over eight minutes left in Miami’s Game 4 loss when he landed awkwardly and rolled his ankle while catching the ball after Jayson Tatum blocked his shot.

He then went to the locker room and got his ankle taped and was able to return with just under five minutes to play.

Thursday morning, Vincent went through a workout but Heat coach Eric Spoelstra said he's not healthy enough to take the court in Boston.

The four-year veteran finished with 17 points in Tuesday’s 116-99 loss after leading the Heat with a playoff career-high 29 points on 11-of-14 shooting in Sunday’s 128-102 victory that gave Miami a 3-0 lead in the conference finals.

Vincent has started each of Miami’s first 15 playoff games and is third on the Heat in postseason scoring at 13.1 points per game behind Jimmy Butler (29.9) and Bam Adebayo (17.6).

His 36 3-pointers this postseason are the most among all Heat players and he’s been solid from the foul line, making 25 of 28 free throws (89.3 per cent).

With Vincent out, 37-year-old Kyle Lowry is expected to move into the starting lineup.

The 17-year-veteran is averaging 9.2 points, 4.5 assists and 3.3 rebounds off the bench for Miami this postseason.

Jimmy Butler says the Miami Heat must play with more energy and like their backs are against the wall when they next face the Boston Celtics.

The Heat missed the chance to progress to the NBA Finals as they lost 116-99 to the Celtics on Tuesday.

Miami now hold a 3-1 series lead in the Eastern Conference finals, ahead of Game 5 in Boston on Thursday.

But for Butler, who scored 29 points and added nine rebounds and five assists, there is no reason to be downhearted.

"If anything, it will build momentum for us knowing that we have to play with a lot more energy," Butler said.

"We've got to play like our backs are against the wall.

"I think all year long, we've been better when we've had to do things the hard way.

"We'll be OK. Let's get back to doing what we've always done to get us to this point, continually have belief in one another, knowing that we are going to win, and we will. We've just got to play harder.

"There's not too much to say with this group because we already know. So we've just got to go out there and execute."

Butler's sentiment was echoed by Miami coach Erik Spoelstra.

"At some point, this is great competition. You know, sometimes it can get skewed, because, whatever, the 3-0," he said.

"But we have great respect for Boston, what they are capable of. They are a dynamic offensive team that takes extraordinary efforts and commitment to get the job done. Our guys really want this.

"A lot of what we've done this year has been the hard way. We've been able to figure out ways to win, even if teams are playing well, if we are not in a perfect flow.

"They got us tonight. You have to give them credit for that."

"It's definitely disappointing," said Heat guard Caleb Martin.

"That would have been a perfect world, perfect situation. But as we know and everybody else knows, we don't typically get things the easy way over here.

"So like I said, this is right up our alley. This is the way it goes for us and guys like us. Again, I think it's only going to prepare us for the long run. This could be good for us."

Jayson Tatum had 33 points and 11 rebounds as the Boston Celtics kept their season alive for at least one more game with a 116-99 win over the Miami Heat in Game 4 of the Eastern Conference finals.

Derrick White and Jaylen Brown each added 16 points and Grant Williams had 14 Boston, which trails the best-of-seven series 3-1 and will try to avoid elimination again in Game 5 on Thursday in Boston.

No team in NBA history has ever successfully rallied from a 3-0 deficit in a best-of-seven series.

The Celtics trailed by nine early in the second half before reeling off 18 straight points for a 70-61 lead. Tatum ignited the run with consecutive 3-pointers, White followed with another, and Marcus Smart also connected from deep.

Boston maintained the lead the rest of the way, though the Heat got within four late in the third. The Celtics responded to score the next seven points and led 88-79 heading to the fourth quarter.

After shooting 11 for 42 from long range in Game 3, the Celtics regained their stroke in this one by going 19 of 45 and limited the Heat to 8 for 32.

Jimmy Butler had 29 points for Miami, which was outscored 48-22 during a 14-minute stretch across the third and fourth quarters.

Jaylen Brown described the Boston Celtics as "embarrassing" after they were blown out by the Miami Heat in Game 3 of the Eastern Conference Finals.

Celtics coach Joe Mazzulla, who has faced criticism throughout the series, blamed himself for the 128-102 loss, as Boston fell to the eighth-seeded Heat for a third straight game.

No team in NBA history has recovered to win a seven-game playoff series when trailing 3-0 and Miami has its first chance to wrap up the series at home on Tuesday.

In a road game the Celtics felt they had to win after two shock home losses, Miami's lead grew to as much as 33 points in the third quarter.

Jayson Tatum led Boston with just 14 points while finishing 6 of 18 from the field and Brown was held to 12 points on 6-of-17 shooting. The two All-Stars were a combined 1 of 14 from 3-point range.

"I don't even know where to start," said Brown after the game, per ESPN. "It's an obvious letdown. I feel like we let our fan base, organization down. 

"We let ourselves down. And it was collective. We can point fingers, but in reality, it was just embarrassing.

"To their credit, they’re playing well above their means.They’re ballin’ right now and I’ve got to give them respect.

"Gabe Vincent, Martin, Strus, Duncan Robinson, guys that we should be able to keep under control are playing their [butt] off.

"The series isn't over yet. It's looking bad, but you come out, have some pride about yourself."

The Celtics were favourites to win the NBA Championship before the series began but now look like a team in crisis just seven days on from their big Game 7 win over the Philadelphia 76ers in round two.

"I just didn’t have them ready to play," said Mazzulla, who is in his first season as head coach.

"Whatever it was, whether it was the starting lineup or an adjustment, I have to get them in a better place, ready to play. That’s on me.

"I think some of the defensive identity has been lost and we have to get that back."

While a comeback to reach the Finals from here would be miraculous, Tatum insists Boston has to first and foremost recover some pride.

He said: "It was tough. From the beginning of the game, we were turning the ball over. We didn't shoot the ball well, they shot extremely well and it felt like we never recovered.

"As tough as tonight was, we just got to try to move on. Prepare, get ready, practice, film and stuff for tomorrow.

"Obviously we're in a tough position but we've got to have some pride, bounce back and just be better come Tuesday."

Jimmy Butler has proven inspirational for the Heat in the postseason far but in Game 3 Miami showcased its roster depth.

Gabe Vincent scored a career-high 29 points and Duncan Robinson added 22 off the bench, propelling the Heat to a lopsided victory that puts coach Erik Spoelstra on the brink of a sixth NBA Finals appearance with the team.

The Western Conference finals also look like they are set to reach an earlier than expected conclusion, with the Denver Nuggets enjoying a 3-0 lead over the Los Angeles Lakers ahead of Game 4 on Monday.

The Miami Heat are now one win away from the NBA Finals after routing the Boston Celtics 128-102 on Sunday to take a commanding 3-0 lead in the Eastern Conference finals.

Gabe Vincent scored a career-high 29 points and Duncan Robinson added 22 off the bench as the duo led a torrid shooting display that propelled the Heat to the lopsided victory.

Miami shot 54.3 percent (19 of 35) from 3-point range for the game, with Vincent going 6 of 9 from beyond the arc and Robinson 5 of 7.

After rallying in the second half to win Games 1 and 2 in Boston, the Heat led virtually from start to finish in this one to go on the verge of joining the 1999 New York Knicks as the only No. 8 seeds in league history to reach the Finals. Miami can wrap up the series at home on Tuesday.

No team in NBA history has lost a seven-game playoff series when leading 3-0.

Miami put together a 9-0 run late in the first quarter to build a 30-20 lead in the final minute of the period, then later outscored the Celtics 25-10 over a 5 1/2-minute stretch in the second quarter to extend the margin. Vincent scored the first five points of the surge, which Robinson capped with a 3-pointer that put the Heat up 59-37 with under four minutes left in the half.

The Celtics never got their deficit out of double digits the rest of the way as Miami’s lead grew to as much as 33 points in the third quarter.

Jayson Tatum led Boston with 14 points while finishing 6 of 18 from the field, while Jaylen Brown was held to 12 points on 6-of-17 shooting. The two All-Stars were a combined 1 of 14 from 3-point range.

The Boston Celtics are not dead and buried despite going 2-0 down to the Miami Heat in the Eastern Conference finals on Friday, insists star forward Jayson Tatum.

Four-time All-Star Tatum posted team-high figures of 34 points, 13 rebounds and eight assists as the Celtics started Game 2 strongly at TD Garden, but it was not enough.

Jimmy Butler's 27 points helped the Heat rally to claim a 111-105 victory, with a game-ending 24-9 run from the visitors leaving the Celtics facing an uphill task to seal consecutive NBA Finals appearances.

Boston now approach back-to-back road games requiring a win to keep the series alive, but Tatum retains confidence in their ability to turn things around.

"It's tough. It's a challenge," Tatum said after Friday's loss. "They came in and won two games. They played well, you have to give them credit. 

"But we're not dead or anything. We've got a great opportunity. 

"I still have the utmost confidence. Everybody has the utmost confidence. We've just got to get ready for Game 3."

Grant Williams attracted criticism for his part in the Heat's fightback, after Butler said a heated fourth-quarter exchange with the Celtics forward provided him with additional motivation late on.

Addressing the incident, Williams said: "I think he said something and I just responded. I'm a competitor and I'm going to battle. 

"He got the best of me tonight, and at the end of the day it's out of respect, because I'm not going to run away from it. 

"You either come back before you die or you come back and get a win, and I'm not willing to die in this finals. I'm ready to get a win. 

"I'm ready to come back and come into Game 3 with a better mentality, and I know this team is as well.

"We have a real, real decision to make, are we going to come back and really set the tone for the rest of this year and really make a statement? 

"Or are we going to come out and lay down? I don't think this team is built for laying down."

Miami's Kaseya Center will play host to Games 3 and 4 on Sunday and Tuesday respectively, with the Heat needing just two further wins to avenge last year's 4-3 Conference Finals defeat to Boston.