Leonard Schlesinger, a Harvard academic and former chief executive of Au Bong Pain, a rapidly growing chain of bakery cafes, says that much "re-engineering" has been crude.

Santos are so confident of re-signing the former Real Madrid player that they are selling shirts through their official online store with his name on the back.

Remember: It's always cheaper to re-sign a former client rather than spend the time and effort courting a new client contract.