Success and failure a question of rotation

There comes a moment in every season when the tough have to get going.

The time when the difference between success and failure begins to depend on the depth of your squad and how you manage your resources.

The days when a club would rely on one group of 14 or 15 players throughout a season are long gone, especially in Italy and Spain where player rotation has been a routine practice for decades. But when it comes to the core group there are some big differences between countries and between clubs within those countries.