When your a sub you should be as focused in warming up as you are when you start a game. At any given moment anything can happen in both scenarios. A yes man or not it becomes null and void you have to be a team player, when the chips are down, your finest moment or your worst, sulking and being petulant helps nobody apart from massaging your own stupid ego. If he doesn't want to be sold, show it, if you want to crack on, show it, stop fucking throwing the toys out of the pram and crack on.