Chelsea's chance of setting a new all-time Premier League record for consecutive wins is over after Dele Alli's brace handed Tottenham Hotspur a 2-0 victory in Wednesday's London derby.
The Spurs sensation's two headed goals condemned the Blues to a first defeat since September's loss to Arsenal, and ended their run of 13 successive victories in England's top flight.
The win sent Mauricio Pochettino's men back up to third in the league standings, with the clean sheet against Antonio Conte's charges ensuring that no Premier League side has a better defensive record than Spurs this term.
A feisty, frenetic first 45 was, by and large, punctuated by few clear cut opportunities. Indeed, Eden Hazard's snapshot, which landed just the wrong side of the upright, was the only meaningful chance inside the opening 20 minutes.
Christian Eriksen flashed his own effort past the right hand post after Victor Wanyama had won possession in the centre of the park midway through the half, while David Luiz and Diego Costa sent efforts over the bar - the former coming from a free kick, the latter after being sent clear by Hazard.
Eric Dier thought he had broken the deadlock six minutes before the interval, but the defender's header from Danny Rose's set piece was clawed to safety by Thibaut Courtois as the game ebbed and flowed.
10 - Dele Alli has equalled his Premier League goal tally from last season (10 in 33 apps), in just 19 PL apps this season. Star.
On the stroke of half-time, though, it was the home side that drew first blood. Kyle Walker sized up Marcos Alonso down Tottenham's right flank before feeding Eriksen in space and, after the Dane had weighed up his options, curled a delightful cross onto the head of Alli, who bulleted a header past Courtois after ghosting in-between Cesar Azpilicueta and Victor Moses 10 yards out.
Hugo Lloris had to be alert from the start of the second 45 - the France international diving low to his right to keep out Costa's sweetly struck strike - while Hazard inexplicably nodded wide from Alonso's wayward header moments later.
The away side were then made to pay for their profligacy on 54 minutes. Referee Martin Atkinson did well to play the advantage after Walker was fouled by Alonso and, in a carbon copy of the first goal, Eriksen swung in another peach of a cross that was converted once more by the head of Alli after he had sneaked in-between Azpilicueta and Moses again.
Refusing to yield, Chelsea pushed for a route back into the game. Spurs' defence, though, was holding firm, and the home side were looking dangerous on the counter as the away outfit threw men forward in search of a goal that would set nerves jangling among the Tottenham faithful.
Conte brought on Willian and Cesc Fabregas in a bid to rescue something from the game, but Pochettino's men were looking the more likely to add to the scoreline.
Alli was handed a standing ovation five minutes before full-time as he was replaced by Moussa Sissoko, with the young star deserving of the acclaim that rippled down from the stands for his match winning exploits, as Tottenham saw out the remaining time to secure a massive victory in the capital.
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