Dele Alli declared Tottenham made a "big statement" with a 2-0 victory over Chelsea as the Blues' 13-game winning run in the Premier League came to an end at White Hart Lane.
The Blues were seeking to equal the Premier League's record of 14 consecutive wins, but Alli's double either side of half-time finally brought the leaders to a halt.
The England midfielder opened the scoring for Spurs just before the break with a well-placed header from Christian Eriksen's cross.
MK Dons academy graduate Alli then headed his second goal of the game on 54 minutes from another fine Eriksen delivery.