Injured Player

[Man In Blue]

Player A Goes up for a bunny and rolls his ankle. From my angle (across from the bench) at the trail there was no contact or very little. Clearly there was no foul.

I blow the whistle and close down quickly to make sure no one steps on the injured player. Coach is hot that we didn't call a foul. I wave him onto the court to help his player. He just stares/ gives me the evil. A second and third time I say coach come help your player. After the third time the AD comes to help. Coach still stays at the bench and glares at me.

Outside of the T, why would a coach think it is more important to work me than help his player? Do you think the AD said anything to him?