Well since it was a non contract injury then it shouldn't scare him from attacking. It could have happened simply dribbling the ball up the court or while guarding a player on defense.
The injury came from coming down on one leg with most of his weight in an awkward position, it wasn't going to happen without that impact. As part of his recovery, I'm sure he'll go through dynamic strengthening and positioning, to teach his body to land in less compromising position to reduce chance of this happening again.