The club captain is under contract until 2022 and has hinted he could move to the MLS.
The World Cup winner told France Football: "I do not think I'm going to finish [my career] at Tottenham.
"I still have a few years ahead of me. In any case, I will do everything to make the most of it.
"You also have to know when to say stop at the right time, but I'm not against the idea of discovering something new. "That could be the United States. I could finish over there, we'll see."
He added: "I never really opened the doors [to the idea of leaving Tottenham] because I felt like I was happy where I was.
"It's not a lack of ambition on my part, it's just that I'm part of a project and every year I've seen the progress to reinforce my decision.
"If tomorrow I felt there was a regression, certainly I'd then ask the question [about leaving]."