Niko Kranjcar proved Tottenham's match-winner for the second successive week as the north London club recovered from going a goal down to win 2-1 at Sunderland.
A crowd of 40,986 saw the Black Cats take an 11th-minute lead when record signing Asamoah Gyan claimed his 10th goal of the season.
But the visitors levelled a minute before the break through Michael Dawson's header as they recovered from a poor start, and Kranjcar completed the job as they turned in a much better second-half display.
The win, which improved Tottenham's run to just one defeat in 15 league outings, lifted them above Chelsea, who do not play until Monday evening.
It also denied Sunderland the chance to reclaim sixth spot from Liverpool, who had drawn with Wigan earlier in the day.
The defeat was a third in succession for Steve Bruce's men, which they have not suffered previously in the league during his reign.
The Black Cats did not need long to get their noses in front, Gyan turning expertly on Kieran Richardson's driven cross and smashing a right-footed shot past Heurelho Gomes.
Spurs lacked real penetration but they equalised just before half-time when Dawson met Steven Pienaar's cross with a firm downward header, and with William Gallas partially blocking his view, goalkeeper Craig Gordon let the ball go between his legs.
And the much-improved visitors grabbed the winner in the 57th minute.
John Mensah got up well to head out Raniere Sandro's right-wing cross but he could only clear as far as Kranjcar, who thumped a sweet volley into the bottom left corner to claim the points.