Lionel Messi has provoked a football frenzy by announcing he wants to leave Barcelona, the club he joined as a 13-year-old in 2000 and has led to four Champions League titles.

This has been a season of problems, on and off the field for Barcelona, but Tuesday’s declaration of divorce, though more extreme than anything in his past, is not the first sulk in Messi’s 20 years at Camp Nou.