Chelsea's attackers were too much for a young Manchester United defence as they won 5-4 to book a place against Leeds in the Capital One Cup's last eight.Chelsea made two defensive errors as Ryan Giggs and Javier Hernandez scored either side of David Luiz's penalty.Gary Cahill made it 2-2 and it appeared Nani's chipped finish would win it but Eden Hazard scored another spot-kick.Daniel Sturridge and Ramires both registered in extra-time before Giggs added a late consolation penalty.Luiz also hit the bar in the added half hour as Chelsea finished on top and were rewarded for introducing the cream of their talents from the bench.Yet they were thankful to young United centre-back Scott Wootton, who pushed Ramires to gift Chelsea their second penalty in injury time and then left his header back to Anders Lindegaard short as Sturridge finally found the net.The enthralling contest was a perfect antidote to the acrimony which resulted from the Premier League match between these two teams three days ago, when referee Mark Clattenburg sent off two Chelsea players and was accused of using "inappropriate language" towards John Obi Mikel and Juan Mata.Referee Lee Mason had an excellent game by calling all three penalties correctly and he also dealing with a scuffle between Oscar and Nani which threatened to boil over.United let the game slip as Hazard and Oscar joined Mata, Moses and Sturridge in a five-star forward line but Sir Alex Ferguson's side were in control in the first half when Chelsea were twice caught while playing out from the back with goalkeeper Petr Cech and David Luiz both culpable.The opener came when Cech played the ball to an isolated Oriol Romeu on the edge of the penalty area, but Anderson stole possession, passed to Giggs and the 38-year-old made no mistake with his finish into the bottom corner.Up until that point the visitors had had more shots on target but did not really test Cech, while the experienced midfield of Giggs, Darren Fletcher and Anderson were easily protecting a young back four that Sir Alex Ferguson selected among 10 changes to Sunday's side.One of them, Alexander Buttner, brought down Moses for Chelsea's first penalty with Luiz converting the kick.It was a fine strike from the Brazilian but he was at fault for United's second when he dribbled the ball past the halfway line but was tackled by compatriot Rafael. Anderson took a touch and sent the ball through to the racing Hernandez who beat Cech for his sixth goal in nine appearances against Chelsea.Rafael, who was United's sole survivor from Sunday, switched to left-back in a second-half reshuffle and he was on hand to dispossess Sturridge, who was well placed to equalise. However, the United full-back could not stop Cahill's header to make it 2-2 following Mata's corner.Chelsea were only on level terms for seven minutes as Nani played a delightful one-two with Anderson to give United the lead again.And despite good headed chances for Sturridge and Cesar Azpiliceuta, neither could find the target.By this stage Chelsea had brought on their big hitters and the reward came when the unfortunate Wootton bundled over Ramires, on for Mikel at half-time, with Hazard coolly converting the resulting penalty.Sturridge finally capitalised on Wootton's soft header to walk the ball around Lindegaard for an easy finish.Hazard set up Ramires to make it 5-3 and even though Giggs added another penalty after Hernandez was brought down, it was merely a footnote on a pulsating evening where the quality of the entertainment was, thankfully, the biggest talking point.