Frank Lampard claimed a half-time dressing-room discussion sparked Chelsea's revival as they came from behind to beat Leeds 5-1 in the Capital One Cup quarter-finals last night.

Chelsea had trailed to a Luciano Becchio strike but turned the match at Elland Road around with goals from Juan Mata, Branislav Ivanovic, Victor Moses, Eden Hazard and Fernando Torres.

"We upped it," said Lampard.

"In the first half we weren't at our best, a bit slow with the tempo of the game and we gave away a silly goal.

"However, once we upped it with a bit of pace in our game you could see a big difference.

"We had a word with ourselves at half-time."

Chelsea flew back into London from the Club World Cup on Monday, but the journey from Japan did not appear to take any toll in the second half, especially once Mata equalised just a minute after the restart.

Lampard added: "We didn't make the greatest preparation but there's no excuse, we had to up it.

"The early goal gave us the impetus, we believed from then on and we didn't think we could lose the game.

"Some of the football we played was great. We opened them up and showed what we could do."

Interim Chelsea boss Rafael Benitez was delighted by his side's performance in the second half, especially after their exertions in Japan.

"The team was quite good in the first half and the reaction of the team in the second half was fantastic after coming back from Japan.

"Jet lag, changing some players....the reaction was amazing," Benitez said.

"We were looking for character and we talked about it at half-time."

He is targeting his first trophy at Chelsea following the draw for the semi-finals, where they were paired against Swansea.

The Spaniard said of the Welsh side: "They are a team that likes to play football, likes to play on the floor and also try to keep the ball so I think it will be interesting."

The other semi-final has League Two side Bradford, who knocked out Arsenal in the quarter-finals, taking on Aston Villa.