Jan Vertonghen insists Tottenham's triumph over Chelsea cannot be a one-off if they want to win the Premier League title.
Dele Alli's double sealed a superb 2-0 victory for Spurs at White Hart Lane, moving them up to third in the table, while ending Chelsea's hopes of a record-breaking 14th consecutive win.
It was only the second time this season that Tottenham have beaten a side in the top six, the other coming in a 2-0 victory against Manchester City in October.
They face City away in a fortnight's time, before travelling to Liverpool next month, but take on both Arsenal and Manchester United at home during the run-in.