The Belgium defender, who is currently sidelined until January with a thigh injury, was due to see his deal expire at the end of the season.
Spurs extend Vertonghen deal until 2020
Tottenham have activated an option to extend defender Jan Vertonghen's contract at the Premier League club until 2020.
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But Spurs have moved to tie the 31-year-old down for an additional year and are believed to be keen to agree a new long-term deal.
A club statement read: "The club can confirm that we have activated the option to extend Jan Vertonghen's contract until 2020."
The 31-year-old joined Spurs from Ajax in 2012 and has been one of the key players in their rise to becoming an established top-four club.
He joins a long list of stars who have their immediate future tied up, with Harry Kane, Son Heung-min, Dele Alli and Davinson Sanchez among those who have agreed new terms in recent months.
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