Juan Mata scored twice in two minutes to lift Chelsea to a 4-2 win and crush Tottenham Hotspur manager Andre Villas-Boas' hopes of exacting revenge on his former employer at White Hart Lane on Saturday.
A comprehensive away win looked on the cards as the Blues dominated a poor Spurs team in the first half, taking the lead through a fine Gary Cahill volley.
Villas-Boas, sacked by Chelsea 226 days ago after a dismal eight-months in charge, inspired a turnaround in his team's fortunes in the second half as Spurs surged ahead through William Gallas and Jermain Defoe, before the Blues stunned their former manager with two goals nearly 20 minutes from the end.
Much has been made of the impact of Eden Hazard and Oscar since they arrived this summer, but it was Mata, signed by Villas-Boas last season, who settled the game with two clinical strikes.
The Spaniard scored his fifth of the season after pouncing on another poor Gallas clearance, and then made it 3-2 soon after with a clever finish from Hazard's pass.
Chelsea boss Roberto Di Matteo, Villas-Boas' right-hand man last season, then punched the air with glee when Daniel Sturridge made it 4-2.
Yet despite the result, Di Matteo believes it is premature to start talking about whether Chelsea is the favorite for the Premier League title.
"I think I would say it is too early to say that," he said. "There are 30 games still to play. It makes us a team that is strong and makes our start even better, but with 30 more games I still think that you have to wait until the Christmas period."
Villas-Boas had claimed personal vengeance was not a motivation for him in the run-up to this game, and he did not look crestfallen at the final whistle.
Yet the Portuguese, who turned 35 this week, must be hurting inside after seeing his team blow an opportunity to tear up Chelsea's unbeaten run and show Roman Abramovich he was wrong to cut short his "project" at the Stamford Bridge.
"I think the game was won by individual brilliance from Oscar, Mata and Hazard who were tremendous today," Villas-Boas said. "These are people who can unlock doors and create problems, and they certainly manage to find gaps and beat people because they are extremely creative and extremely good. A player is always a good player. We signed Mata for his talent and he is certainly not going to stop producing these moments of brilliance like he had today."
It was all smiles for the former Chelsea boss at the kick-off. He shared handshakes and hugs with the Chelsea staff after emerging from the tunnel, but his smile soon disappeared.
Chelsea started strongly and took the lead in the 17th minute when Gallas' poor header fell straight in to the path of Cahill, who fired a bullet volley beyond Brad Friedel from 12 yards.
Petr Cech did well to parry a low Defoe drive but Spurs were poor and both Lennon and Defoe were wasteful in front of goal.
Gylfi Sigurdsson offered a brief glimmer of hope when he shot a yard wide -- but Chelsea should have doubled its lead moments later when Mata picked up a rebound from his original shot at Friedel, but he skied well over from 10 yards.
Tottenham started to lose its discipline, with Gallas and Kyle Walker both seeing yellow for rash challenges.
However, the hosts started the second half brightly and leveled within 65 seconds of the restart when Jan Vertonghen hooked Tom Huddlestone's free kick across the box and Gallas nodded in from one yard.
Spurs looked a totally different side to the one that waded slowly through the first half, launching wave after wave of flying attack.
Sigurdsson tested Cech with a powerful shot and saw another deflected effort fly just over.
Villas-Boas remained calm, but he was soon off his bench punching the air again when Defoe snuck in between two defenders to clip the ball past Cech from Lennon's pass. It was his 200th career goal.
Cole thought he should have had a penalty when he went down under pressure from Gallas, but the referee waved play on.
Villas-Boas felt the passion of the occasion may have counted against his side as they looked to hold on to their 2-1 lead.
"I think on the positive side we have shown great strength of character to come back into the game in the second half," he said. "The amount of intensity was a problem because we wanted to calm the game down, but calming a game down at this level is extremely difficult. There is so much passion involved and so much emotion -- it was so frenetic, us losing the ball and them losing the ball."
Spurs threw everything at the visitors but could not beat Cech again and Chelsea made them pay with two crucial goals from Mata in two minutes.
First the Spaniard latched on to Gallas' poor clearance to beat Friedel and he then lost the Tottenham defender soon after to latch on to Hazard's pass and make it 3-2.
"That's why we're champions" shouted the fans of the Chelsea team whose victory in Munich denied Tottenham a place in the Champions League last year.
Only a top save from Friedel prevented the Spaniard completing his hat trick moments later.
The former Arsenal man made an immediate impact, nodding the ball to Sigurdsson, but despite some excellent skill, the Iceland international could only shoot over.
Torres curled a chance to put the game to bed wide with four minutes left and Adebayor stabbed at a chance soon after when Cech spilled the ball, but the Chelsea stopper smothered it.
Sturridge, a late replacement for Oscar, made the points safe in the 91st minute -- and the away fans taunted, "Andre, what's the score?"
"We have plenty in the squad," he said. "But we missed them because they're quality. All of us here present know what they can do, but we replaced them with two good players as well who played really good as well in Sigurdsson and Huddlestone."
Information from Press Association was used in this report.