I could be wrong but at the very beginning of that clip, Morris looks to have given Jokic a forearm to the head area, you see Jokic go back a bit and that’s when he retaliates. Not excusing Joker, but I have little sympathy for either Morris twin as they are two of the dirtier players in the league IMO.
**ok, yeah so I just watched to the end of the clip. He is retaliating for the cheap foul