Chelsea were dumped out of the FA Cup by League One side Bradford 2-4 at Stamford Bridge this afternoo
Jose Mourinho made nine changes from the last league game against Swansea City but there were enough seasoned internationals on the pitch for this rout not to have happened
First half strikes by Gary Cahill and Ramires looked to have booked under-performing Chelsea into the 5th Round, but a lacklustre second half allowed the Yorkshire side to inch their way back in.
Strikes from Jon Stead, Filipe Morais and Andy Halliday eight minutes from time ended any resistance. Substitute Mark Yeates's 94th minute goal rubbed salt into the already deep embarrassed wounds of the Premier League leaders.
Filipe Morais was lucky still to be on the pitch after 15 seconds when he appeared to elbow Cesar Azpilicueta right in front of the dugout areas bit referee Andre Marriner ignored the near assault.
As one would expect, The Blues dominated the opening exchanges in regard to possession, without creating any clear cut chances. A half chance by Didier Drogba who cut a left-footer high and wide into the Shed, housing 6,000 screaming Bradford City fans.
Petr Cech made a sensational goal line one-handed save from the bullet header from centre back
Andre Davis on 13 minutes. Pure instinct kicked in by Cech to thwart lively Bradford who seconds earlier saw a Gary Liddle pile-driver smack of the head of Gary Cahill as it was arrowing into the Chelsea net.
A half-hearted Loic Remy and Oscar drive did nothing to suggest Chelsea could create a chance in open play. But a set piece was the visitors' undoing on 22 minutes.
A simple near post corner by Oscar saw Cahill flick the ball high into the roof of Ben Williams net to put disjointed Chelsea ahead.
Goal number two came seven minutes before the break through Ramires.
The Brazil midfielder won the ball in midfield from ex-Chelsea youth product Filipe Morais and tucked home the ball from just inside the Bradford penalty area after a fine 1-2 with Mohamed Salah.
But plucky Bradford would not give up and three minutes later struck the goal the game from the left boot of Jon Stead who thrashed the ball on the edge of the Chelsea area, giving Cech no chance.
There were no changes at half-time.
Cech had to be alert to halt Bradford's March for an equaliser twice in the space of two minutes at the start of the second half.
Successive corners too forced the home side to retreat to their own penalty area. But not scoring from their dominance meant that the inevitable lull in their aggression would see Chelsea regain control of the game.
Jose Mourinho replaced Salah for Willian, with Cesc Fabregas on for injured Mikel on 71 minutes.
Drogba could have settled it but his header from a Fabregas free kick went straight to Williams's midriff.
Sensationally the Yorkshire side equalised with 15 minutes in the clock. Billy Knott's low drive forced Cech to parry the ball out. It fell straight to Morais, unmarked, who rammed the ball into the open net.
Mourinho brought on Eden Hazard for Remy in a desperate attempt to settle the tie at the first occasion.
Then Bradford scored a third with nine minutes left. Stead knocked the ball down into the path of Andy Halliday who arrowed the ball high and wide of the despairing dive of Cech.
Substitute Yeates's then finished off the Blues with a cool finish three minutes into seven minutes of added time.
Teams: Chelsea , Cech; Christensen, Zouma, Cahill, Azpilicueta; Ramires, Mikel; Remy, Oscar, Salah; Drogba (c)
Subs, Courtois, Terry, Ake, Fabregas, Loftus-Cheek, Willian, Hazard.
Bradford City, Williams; Darby, McArdle, Davies, Meredith; Liddle, Morais, Halliday, Knott; Hanson, Stead.
Subs, Urwin, Sheehan, Clarke, Zoko, Yeates, Kennedy, Routis.