Barcelona's Argentinian forward Lionel Messi (L) goes to the medical center of the FC Barcelona Sports Center Joan Gamper in Sant Joan Despi, near Barcelona, on April 3, 2013, a day after the UEFA Champions League quarter-final football match PSG vs Barcelona. Lionel Messi has not been ruled out of Barcelona's Champions League quarter-final second-leg against Paris Saint-Germain on April 10 despite suffering a hamstring problem in the first-leg on April 3. The four-time world player of the year was substituted at half-time of the 2-2 draw against Paris Saint-Germain and will miss the Liga clash with Mallorca on April 6. AFP PHOTO / QUIQUE GARCIA
Lionel Messi of FC Barcelona with the match ball after scoring three goals during the La Liga match between FC Barcelona and RCD Espanyol at Camp Nou on December 7, 2014 in Barcelona, Spain.
Credit: Alex Caparros
Lionel Messi of Argentina celebrates after scoring his team's second goal during the 2014 FIFA World Cup Brazil Group F match between Argentina and Bosnia-Herzegovina at Maracana on June 15, 2014 in Rio de Janeiro, Brazil.
Credit: Matthias Hangst
Lionel Messi of Barcelona celebrates scoring his team's third goal as Cristiano Ronaldo of Real Madrid looks dejected during the La Liga match between Real Madrid CF and FC Barcelona at the Bernabeu on March 23, 2014 in Madrid, Spain.
Credit: Gonzalo Arroyo Moreno
Ballon d'Or nominees Lionel Messi of Argentina and FC Barcelona (L) and Cristiano Ronaldo of Portugal and Real Madrid smile during the FIFA Ballon d'Or Gala 2014 at the Kongresshaus on January 12, 2015 in Zurich, Switzerland.
Credit: Philipp Schmidli
Lionel Messi of Argentina looks on during a friendly match between Romania and Argentina at Arena Nationala Stadium on March 05, 2014 in Bucharest, Romania.
In this composite image a comparison has been made between Franck Ribery (L), Lionel Messi (C) and Cristiano Ronaldo (R). All three players have been short listed for the FIFA Ballon d'Or 2013, the winner of the award will be revealed at the FIFA Ballon dOr gala in Zurich on January 13, 2014. SEPTEMBER 28: Cristiano Ronaldo of Real Madrid CF runs with the ball during the La Liga match between Real Madrid CF and Club Atletico de Madrid at Bernabeu on September 28, 2013 in Madrid, Spain.