straight to your inboxHow do you replace arguably the greatest player that has ever lived?That is the question that Barcelona could face this summer after Lionel Messi dropped the bombshell of the year by announcing his desire to leave the club following their humiliating end to their league season.Some United supporters dared to dream about Messi ending up at Old Trafford, but MEN Sports understand such a deal is implausible despite repeated links from all over the world.