Nah, it happens all the time whether it's professional or just a random pick up game. I don't think Zaza did it on purpose. It sucks it happened because now the series is over because Kawhi gonna miss at least 1 game and won't be right the whole series when he does play.
The spurs did just beat Houston's ass without him, not saying Houston's as good as GS, but I wouldn't count them out tonight.