After a lethargic first-half display Chelsea found themselves 1-0 down to second-tier Leeds.
The Blues sparked into life after half-time, eventually winning 5-1 to book their spot in the final four of the competition.
After the game Frank Lampard admitted that the Londoners had had a serious chat during the interval and reorganised ahead of the final 45 minutes.
Their preparations worked perfectly with Juan Mata scoring quickly after the restart, before Branislav Ivanovic, Victor Moses, Eden Hazard and Fernando Torres completed the win.
