Giannis Antetokounmpo is one of the most exciting young superstars in the NBA, constantly wowing crowds with a brand of unbelievable athleticism that got him branded with the “Greek Freak” nickname. Unfortunately Antetokounmpo made the highlight reels for all the wrong reasons over the weekend.

During a game against the Utah Jazz, Antetokounmpo lost his cool in the middle of a frustrating performance from his Bucks, which led to him swatting a chair during a timeout after the Jazz had converted an easy dunk. We’re not sure what happened next, but Milwaukee assistant coach Sean Sweeny must have had a comment or two, because cameras caught Antetokounmpo shouting what appeared to be “I’ll f**k you up” in Sweeny’s direction.

On Sunday, Antetokounmpo confirmed the spat with Sweeny but brushed it off as two competitive guys trying their hardest to win.

The Bucks have lost three out of their last four games and sit in tenth place in the Eastern Conference with a purely average 9-9 record. They play the Sacremento Kings on Tuesday night and will be looking to get back in the win column.