FORCING A PLAYER TO LEAVE FOR A SUBSTITUTE?

Question:
What happens if the player does not want to go out the field when a substitution is called? Can the ref force the player out? Who has the final say?

USSF answer (May 26, 2011):
The player cannot be forced to leave the field. He or she might be in trouble with the team, but no one can make him or her leave. As the Law tells us, “play continues.”