Fulham celebrated a first win over local rivals Chelsea in almost 17 years on Thursday, with their 2-1 victory at a bouncing Craven Cottage moving them up to sixth in the Premier League and heaping the pressure on Blues boss Graham Potter, who saw new loan signing Joao Felix sent off on his debut
It was Chelsea old boy Willian who got Fulham up and running after an encouraging start from the visitors, firing in (25) with the help of a deflection against the side where he spent seven years of his career
Fulham had already had a penalty appeal waved away and struck the bar through Bobby Decordova-Reid by that point, with Chelsea's defence clearly low on confidence, but Potter's men struck back at the start of the second half when Kalidou Koulibaly (47) forced the ball over the line after Mason Mount's free-kick hit the post
That looked set to provide Chelsea with the platform to go on and grab a morale-boosting comeback win - instead they would fall to a rare and hugely damaging defeat to their neighbours
 They now have six points from their last nine Premier League games, their worst run since 1996
Felix had seemed destined to grab the headlines after being thrown into the starting line-up just over 24 hours after completing his switch from Atletico Madrid, with a fantastic first-half performance lighting up what has been a toothless Chelsea attack
 But in the end, his first appearance will be remembered for a foolish studs-up lunge at Kenny Tete
His straight red card on 57 minutes means he will now be suspended for three of the remaining 20 Premier League games of his loan period, compounding Potter's problems on a night Denis Zakaria was added to their already lengthy injury list
It was all smiles for Carlos Vinicius though as he ended a 10-month goal drought with a towering header the suspended Aleksandar Mitrovic would have been proud of to win it for the hosts
At the halfway stage of this campaign they have already surpassed their points total from their last stint in the Premier League and may even be dreaming of qualifying for Europe
For Chelsea, those kind of ambitions seem a long way away
 They stay 10th, 10 points off fourth-placed Manchester United who have a game in hand and their next London derby, at home to Crystal Palace on Sunday, is surely now must-win for Potter
It had all started encouragingly for Chelsea, with Felix instantly sparking their attacking play into life
 Within two minutes he'd nutmegged Tim Ream to set up Kai Havertz for a blocked shot which led to Lewis Hall wasting a follow-up
 By the quarter-hour mark the Chelsea fans were singing his name, with Antonee Robinson and Andreas Pereira both in the book for bringing down the stylish, dangerous, roaming forward
But for all the added impetus Felix brought to Chelsea's attack, their lack of belief at the back was plain to see and proved to be their undoing
Fulham saw a penalty appeal waved away when Zakaria bundled into Vinicius and smashed the woodwork through Decorova-Reid when Trevoh Chalobah miscued a header amid an error-strewn performance
 They finally hit the net through former Chelsea man Willian
Cesar Azpilicueta should have known his former team-mate well enough not to let him step in on his right and Chalobah should have done better with his attempted block, which deflected the ball in off the post beyond Kepa Arrizabalaga
 But Fulham's supporters behind the goal didn't care one bit and revelled in taking the lead against their neighbours who they last beat in March 2006
Chelsea, who had scored just three in their past seven fixtures, had opportunities before the interval to level, with Bernd Leno denying Felix twice, either side of another good opening for Hall but after what would have been an uncomfortable half-time break, they came out firing in the second half
Within two minutes of the restart they were level, with Koulibaly forcing the ball home after Mount's free-kick hit the frame of the goal
 A turnaround looked to be on the cards
 But within the space of another two minutes Potter was left cursing his luck once more, with Zakaria limping off and then Felix sent off for stretching for the ball after a poor touch and catching Tete's shin
Potter looked bewildered by his bad luck in the dugout and while his 10-man team initially pushed forward they were caught out by Pereira's deep cross which allowed Vinicius to shake off his markers and nod home with Kepa nowhere
A quadruple substitution from Potter couldn't inspire a second Chelsea equaliser, despite Azplicueta going close and the excellent Leno deny Havertz again, and a jubilant Fulham celebrated just a second win over Chelsea in their last 31 attempts
 A rare triumph for the hosts - but a now all-too familiar painful feeling for under-pressure Potter
"It's really frustrating, incredibly challenging
 I feel for the supporters
 We're disappointed to lose tonight
 I felt it was a relatively even game in the first half, we had a couple of chances
 But I think the basics we can do a little bit better, in terms of our defending and football actions
 We get back in the game and the red card is where we're at at the moment, in terms of things that can happen to us [do happen to us]
"To lose Joao for three matches is really disappointing
 Joao is a young player, a top player, you can see his quality and there wasn't any malice [in the tackle] but the ref has a decision to make
 He'll learn from it
"More than anything fantastic from the opponent it was more our basic actions where we have to do better
"We are suffering at the moment
 We're suffering, the fans are suffering
 We feel for them
 It's important to stick together and try to get through this tough period
""It was a great night for our fans, after 16 years they deserve it
 Chelsea are a massive club, their budget is completely different, we can't compare anything but with our work, strategy, identity we could do it and we did it
"For our football fans it's special
 I felt it after the final whistle in that moment, the way they celebrated with our players
 A really important moment
 Another three points for us - and I know in Premier League all the points are really tough to get
"It's been a fantastic season so far for us, but we know we're just in the middle of the season
 I still see a big room to improve
 This is one of the positives I take from the game
 We won the game, but big room to improve and we'll keep working hard with our players
"Fulham are back in Premier League action on Sunday when they travel to Newcastle; kick-off 2pm, live on 
Meanwhile, Chelsea host Crystal Palace at Stamford Bridge on Sunday; kick-off 2pm
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