Kevin Durant called it a masterpiece. The Celtics called it an unacceptable collapse. The Brooklyn Nets were just happy it ended up as a victory.

Caris LeVert scored 37 of his 51 in the fourth quarter and overtime to help the Nets erase a 21-point, second-half deficit and beat Boston 129-120 on Tuesday night.

"The basket was so big at that point. I got some easy layups going to the rim," LeVert said. "I'm just trying to get a good look."

It was a stunning end to a four-game losing streak for Brooklyn, which is trying to hold onto the final playoff spot in the Eastern Conference. Boston has lost two straight.

LeVert had all of Brooklyn's 11 points in the extra period, finishing just three points shy of the Nets' season high for a player. Kyrie Irving scored 54 points against Chicago on Jan. 31.

Nets coach Kenny Atkinson pulled his starters in the third quarter before inserting LeVert in the fourth. LeVert sent the game to the extra frame, getting fouled on a 3-point attempt by Marcus Smart and connecting on all of his free throws with 0.2 seconds left.

"The second quarter, I think I only had like two buckets that quarter and the third quarter I didn't score," LeVert said. "I knew that if I got the chance to go back in there we had a shot at winning the game."

That capped a 51-point fourth quarter by the Nets, a franchise record for most points in any period.

"It's really hard to even comment," Atkinson said. "I'm trying to, like, process it all — 51 points in the fourth quarter against a team like that."

"That 50 was beautiful, Vert," Kevin Durant, who is out for the season recovering from a torn Achilles tendon, tweeted. "Thank you for that masterpiece."

Irving, who left the Celtics in free agency this past summer, was sidelined for the Nets' second visit of the season to Boston after undergoing arthroscopic surgery on Tuesday to relieve a right shoulder impingement. Irving was ruled out for the season in February because of the injury.

His absence didn't stop fans from taunting him with chants of "Where is Kyrie? Where is Kyrie?" in the fourth quarter.

Jaylen Brown led Boston with 22 points. Kemba Walker returned to action following a five-game absence with left knee soreness and had 21 points. Smart added 14 points and 10 rebounds before fouling out in overtime.

Smart had some words for officials after the final buzzer and had to be separated by teammates before being led into the tunnel.

Boston went just one for six from the field in overtime.

"Sometimes things don't go your way and the other team gets to feel really good and then you feel like the weight of the world is on your shoulders to finish the game," Celtics coach Brad Stevens said. "Usually you do that with your effort. We didn't get any of that stuff. So we deserved to lose."

The Celtics played without Jayson Tatum, who sat out with an illness. They also lost Gordon Hayward, who left the game at halftime with a bruised right knee. Boston scored 23 points off 21 Brooklyn turnovers and was in control before the Nets rallied behind LeVert and their bench.

"You've got to treat it as a learning experience," Hayward said. "When you take your foot off the gas, anybody can come back on you,"