The Spanish international played an integral part last season as the Blues claimed both the Champions League and FA Cup trophies.
However, the 24-year-old has admitted that he is desperate to win England's domestic division before he departs Stamford Bridge.
"I really want to win the Premier League, even though we know it's difficult," he told the club's official website. "Playing here at Chelsea every season you've got the opportunity to win it."
Mata joined Chelsea in the summer of 2011 from Valencia.