Chelsea gained revenge for its weekend defeat to Manchester United as an equalizer four minutes into injury time and two goals in extra time earned the Blues a 5-4 win at Stamford Bridge on another thrilling night in the Capital One Cup on Wednesday.
Both goals were down to mistakes by young defender Scott Wootton, who gave away the penalty that Eden Hazard scored right at the end of normal time and then inadvertently played in Daniel Sturridge with a weak back header for another.
Ramires made it 5-3 before a Ryan Giggs penalty pulled United back to within one in another topsy-turvy match after Arsenal's remarkable 7-5 win at Reading on Tuesday.
Chelsea was handed a trip to old rivals Leeds in the quarterfinals as a reward for their comeback win. Leeds already has dispensed with two top-flight opponents in the competition, knocking out Everton 2-1 and Southampton 3-0 -- both on home turf.
Sunday's Premier League game between Chelsea and United was overshadowed by the accusations of "inappropriate language" against referee Mark Clattenburg, but this time the football took center stage.
United took the lead in the 22nd minute after a defensive mix-up by Chelsea, with Giggs taking advantage by scoring with a well-placed shot into the bottom corner from the edge of the area.
But Javier Hernandez, who got the winner Sunday, continued his fine record against the Blues with another smart finish two minutes before the break.
But Chelsea simply could not keep things water-tight at the back and was cut apart by a superb combination between Anderson and Nani seven minutes later, with the Portuguese dinking a beautiful finish past Petr Cech.
Chelsea was denied a strong penalty claim when the ball appeared to strike Wootton's arm, adding to their list of grievances following the two sendings off in the league game.
But Chelsea did get a penalty in the fourth minute of injury time as this time Wootton was punished for a push on Ramires and Hazard rolled his penalty low down the middle.
Chelsea boss Roberto Di Matteo insisted he was not worried about how Chelsea would be refereed after making their complaint against Clattenburg, who is understood to deny any wrongdoing.
"I think the referees should be going into the games with the most confidence that they have," he said. "We're all under pressure here -- the players, the officials, the coaching staff -- to perform. And I don't think there's any prejudice from that point of view."
Worse was to come for Wootton seven minutes into extra time as his attempted header back was too short and Sturridge, who up till then had been awful, rounded Anders Lindegaard to score.
Ramires added another in the 116th minute, dancing around the Dane for number five.
United was not done, with Giggs slotting home from the spot after a foul on Hernandez, but there was not enough time to get an equalizer.
"We've thrown it away, really," United boss Sir Alex Ferguson said. "We've got possession of the ball in the last third of the field in the last seconds of the game. Nani tried to beat a player. We lost the ball and lost the game."
Elsewhere, Norwich scored twice in the final seven minutes to come from behind and win 2-1 at home to Tottenham after Clint Dempsey missed a late penalty.
Dempsey had the chance to make it 2-2 from the spot a minute later, but his low effort was kept out by Mark Bunn in the Norwich goal.
"I thought (Bunn) was excellent," Norwich boss Chris Hughton said. "He is a really good goalkeeper. I can't imagine he was at fault with Tottenham's goal because it was a wonderful strike from Gareth Bale. Overall he showed good composure and he had good hands. The save for the penalty was fantastic. He was brave."
Norwich will host Aston Villa in the quarterfinals.
Spurs goalkeeper Huo Lloris was one of seven changes manager Andre Villas-Boas made to the side that returned to winning ways at Southampton last weekend. Lloris performed well throughout until he dropped Holt's header just before Jackson lashed home.
Villas-Boas refused to criticise the France goalkeeper.
"He did extremely well in the game. He had a good solid performance," the Portuguese said. "It is difficult for goalkeepers in situations like these."
Brendan Rodgers saw his defending champion Liverpool side crash to a 3-1 defeat at home to former club Swansea.
Rodgers paid the price for fielding a weakened team as Chico headed the Swans in front just after the half-hour mark.
A Nathan Dyer finish made it two 18 minutes from time and, even though Luis Suarez came off the bench to pull one back four minutes later by heading home a Steven Gerrard free kick, Jonathan de Guzman killed the Reds off in stoppage time.
Swanswea will next host Middlesbrough, which earned its place in the quarterfinals with a derby victory over Sunderland in the fourth round.
League Two outfit Bradford, the lowest-ranked side still in the cup, was dealt a tough draw against Arsenal but at least has the benefit of home advantage.
Quarterfinal matches are due to take place on the week commencing Dec. 10, except for Leeds against Chelsea, which is deferred until Dec. 19 because of the Blues' participation in the Club World Cup.
Information from Press Association was used in this report.