Frank Lampard scored the winner with two minutes left as Chelsea beat Fulham 2-1 to reach the League Cup semifinals on Tuesday.
In the other match, Football League Championship side Watford eliminated Premier League club Portsmouth 3-0.
At Craven Cottage, Chelsea took the lead through Damien Duff in the 55th minute. Fulham leveled in the 74th when substitute Elvis Hammond set up US international Brian McBride. But goalkeeper Edwin van der Sar was at fault for the winner, allowing Lampard's shot through his hands.
"We beat them 4-1 here a couple of weeks ago [in the league] so we knew that was fresh in their minds," Lampard said. "We never think we're invincible -- Arsenal got to that level last year and we've got to get there.
"We want to go on and win this competition -- a potential trip to the Millennium Stadium means we could have a cup in the bag by the end of February.''
Heidar Helguson struck twice and set up Bruce Dyer for the third goal as Watford eliminated Portsmouth. It was the first loss for Pompey since manager Harry Redknapp quit last week.
Wednesday's quarterfinal matches are Manchester United vs. Arsenal and Tottenham vs. Liverpool. The winner of the League Cup, England's second tier club knockout competition, gets entry to the UEFA Cup next season.
The sex scandal that prompted the Football Association's top official to resign just won't go away.
The secretary whose affairs with FA chief executive Mark Palios and England coach Sven-Goran Eriksson made headlines over the summer is now accusing another senior FA official of sexual harassment.
Faria Alam, who no longer works for the FA, is seeking compensation of a year's salary of around ?30,000 (US$56,700), contending she was forced to quit her job.
"She wants all this out in the open," Alam's adviser, Max Clifford, said Tuesday. "All she wanted was for this to be settled and she is prepared to go public if she doesn't get what she wants."
Neither Clifford nor media reports identified the FA official accused of sexually harassing Alam. He reportedly still works at the organization.
Alam's affairs with Palios and Eriksson plunged the FA into crisis in July and August.
Palios resigned, as did the communications director, Colin Gibson, who tried to broker a deal with the tabloid that broke the story.
After an initial denial, the FA confirmed that Eriksson had an affair with Alam. The FA board investigated whether the Swede misled them about the affair but ruled he had no case to answer.
Brian Barwick, former controller of ITV Sport, was appointed last week as Palios' replacement. He takes over on Jan 31.
Diouf admits spitting
Senegal World Cup striker El Hadji Diouf will miss Bolton's next three games after he admitted a misconduct charge on Tuesday for spitting in an opponent's face.
Diouf, who has a history of similar conduct, spat at Portsmouth captain Arjan de Zeeuw during Bolton's 1-0 loss at home on Saturday.
It is the second time that the striker, who is on loan from Liverpool, has been fined for spitting.
Diouf issued an apology after Saturday's incident but Bolton fined him two weeks' wages before the Football Association served a charge of improper conduct.
Suspensions handed out
Middlesbrough defender Franck Queudrue and Aston Villa's Lee Hendrie were each suspended for three matches on Tuesday after losing appeals against red cards.