Chelsea set up an FA Cup final against Liverpool after putting Tottenham to the sword with a ruthless beating at Wembley, but they were helped on their way by a goal which should never have been given.
Juan Mata put the Blues two up after the break in hugely controversial circumstances with referee Martin Atkinson awarding the goal despite replays showing the Spaniard's shot did not cross the line.
But that slice of luck could not detract from Chelsea's superiority.
Didier Drogba scored his seventh goal at Wembley to put the Blues ahead and, even though an incensed Spurs pulled one back straight after Mata's second through Gareth Bale, a cool finish from Ramires, a blistering 30-yard free-kick from Frank Lampard, and a late fifth from Florent Malouda wrapped up a huge win for the west London club and piled yet more misery on Spurs boss Harry Redknapp.
Many saw this evening's game as an audition for Redknapp at the home of English football, but his team were nowhere near clinical enough and Roberto Di Matteo's deserved the win.S
Chelsea, now through to their 11th FA Cup final, raised their game to play like a team used to gracing the Wembley turf while Redknapp's team were wasteful and nervous.