He's already going down when he plants the foot that launches him into Conley. This is just normal sports shit when things go wrong, it isn't a guy targeting another guy's knees.
Y'all need to stop watching superhero movies and maybe play some sports so you can understand how insane it is to watch replays and judge every split second with intent and meaning, instead of seeing just a dude going to the ground and trying to maintain footing and control of a ball.