When your opponent is pulled way out of the side line, it seems like you already have the point but actually you are not safe yet. If he has the time to set up for the ball, he can still hit a winner against you (aka Nadal), in fact he has more open space to hit into when he is way out of the court. So where should you stand in preparation for his one last shot? At the net? Cross-court at the baseline? At the centre of the baseline? At the corner of the baseline closest to your opponent? It seems to me no matter where you stand you still leave a lot of open space for him.