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8:20 AM PT — TMZ Sports has learned … the NBA is currently looking into the situation.
Nikola Jokic‘s brother was in no mood to celebrate the Nuggets’ comeback win over the Lakers on Monday … ’cause he straight-up punched a fan in the stands at the playoff game — and it’s all on video.
According to witnesses, the violent incident went down shortly after Joker and his Denver teammates completed their 101-99 win against LeBron James and co. to go up 2-0 in the first-round series.
The clip shows Joker’s older brother, Strahinja, hop over a Ball Arena seat and down a row … kicking his way through the crowd to get closer to the male spectator.
As soon as Strahinja got within arms reach, he unloaded a fierce punch with his right hand that hit the fan right in the face.
The two sides weren’t done with each other after the hit, though … they continued to bark at each other as Strahinja’s brother, Nemanja, followed right behind him for support.
The two-time MVP’s wife, Natalija, was just feet away from Jokic’s brothers throughout the altercation … holding their young daughter as she reached out to reel Strahinja back.
It’s unclear what led to the altercation … we’re working on it.
TMZ Studios
The massive Jokic brothers are notorious for passionately defending the NBA superstar at games … and they’re certainly not shy to let their feelings known to players, referees and fans.
The NBA is known to throw the hammer down on unruly fans … but considering Jokic is one of the best players in the league, it’ll be interesting to see if any punishment comes from this.
Originally Published — 7:42 AM PT