Javier Mascherano has signed a "new and improved" four-year contract with Barcelona until the summer of 2018.
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Mascherano, 30, has impressed at Camp Nou since signing from Liverpool in 2010, and starred as Argentina reached the final of the World Cup this summer.
The Argentine international has committed himself for another four years #photo #fcbarcelona http://t.co/4LSwK4DXkB pic.twitter.com/nvsFa2jmUU
- FC Barcelona (@FCBarcelona) August 26, 2014
The midfielder -- who has regularly been used as a centre-back during his Barca career -- agreed the deal back in June, and has now put pen to paper to secure his long-term future at the club.
"I'm committed to this club until the final day of the contract," he told the club's official website. "I hope I can live up to expectations of the club.
"I'm really happy to be at this great club and be part of a squad with such great players. Let's hope things go really well for us this season. We're looking forward to this season after some difficult times last campaign."
The contract includes a 100 million-euro buyout clause and the option of a further year for Mascherano, who has won two Liga titles and one Champions League with the Catalan side.