Yes, and Perez signalled to the bench a couple of times to let him carry on, no different at all. In the end it was that Perez gestured for the change.
You have to trust the player as well.
Manager/Medical team - "How is it"?
Player - Just a twinge, I should be okay.
Basically, Kayal is 100% at fault for this and should have come off for the good of his team.