on the Barcelona website said: "Leo Messi extended his contract with FC Barcelona through 30 June of 2018.
"The signing ceremony was attended by the player, president Sandro Rosell, vice-president Josep Maria Bartomeu and the director of football Andoni Zubizarreta.
"Messi added two additional years to his existing contract, which was set to expire in June of 2016.
"The player, who joined the club when he was 13 and made his first-team debut three years later, will be 31 when his contract expires."
Barcelona are top of La Liga with a nine-point cushion over nearest rivals Atletico Madrid. They play the first leg of their last 16 tie in the Champions League away at AC Milan on 20 February.
Messi has been in the best goal-scoring form of his career and surpassed Gerd Mueller's
40-year-old record of 85 goals
scored in a calendar year with a brace in a 2-1 win over Real Betis on 9 December.
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