The Croatian midfielder, who has been the subject of reported interest from manchester United, has signed a new six-year deal at White Hart Lane.
"Tottenham Hotspur gave me my chance in the Premier League and I want to go on to achieve great success here with them," he has told the club's official website
"Yes, there have been enquiries from other big clubs, but I have no interest in going anywhere.
"Last season's top-four finish was an indication of where we are as a club and I feel I can continue to improve and go on to achieve everything I want to at Spurs."