After a spectacular haul of trophies with Barcelona, Lionel Messi has a chance to lead Argentina to glory on the World Cup stage and build on his reputation as one of the all-time greats. The four-times World Player of the Year has won a glittering array of club silverware and has established himself as one of the finest footballers to grace the game, but some believe he must win the World Cup before he can be hailed as a true great. Many others believe, at the age of 26 - he turns 27 during the tournament on June 24 - he already has.Messi is inevitably compared with Diego Maradona, who inspired the nation to victory at the 1986 World Cup in Mexico, and will travel to Brazil with considerable expectation on his shoulders.