“Madness,” Lionel Messi called it, but even he hadn’t imagined it being this mad. One Friday in September Messi walked into the dressing room at Barcelona’s Sant Joan Despí training ground and it hit him. After six years his best friend wasn’t there, so he sent him a message. “It’ll be strange seeing you in another shirt,” it said, and two days on he discovered how strange when Luis Suárez made his Atlético Madrid debut. Introduced as a sub against Granada, 90 seconds later, Suárez