Phil Parkinson has hailed his side's 'magnificent' performance at Stamford Bridge.
The Bantams came back from two goals down to beat the Premier League leaders at Stamford Bridge, a result which is certainly the shock result of the fourth-round ties.
And boss Parkinson has hailed the win as the club's victory as the stuff dreams are made of.
“To be 2-0 down and win 4-2 is what dreams are made of,” Parkinson said.
“The way we played in the second half, I thought we were absolutely magnificent, we really took the game to Chelsea, a team that is so solid defensively and we scored some great goals against them."
Parkinson’s side had fallen behind to goals from Gary Cahill and Ramires and Jose Mourinho’s men looked to be comfortably heading towards the fifth round of the competition before a John Stead goal gave the away side confidence ahead of half-time.
Former Chelsea man Filipe Morais then scored the equaliser against his old club before goals from Andy Halliday and Mark Yeates saw them to a famous 4-2 victory that nobody would have seen coming.
“The magnitude of the victory in terms of beating the league leaders, one of the best teams in Europe has got to be the best performance overall,” he added.
“The day we got to Wembley, by winning at Villa Park would take some beating for the sheer scale of that, but I just think the performance here today, the way we played, the way we attack was just incredible and it will be a day that will be remembered for a long time.”
Chelsea now face Liverpool in the second leg of their Capital One Cup semi-final at Stamford Bridge. Will the Blues be rattled after their famous defeat?
Bradford, meanwhile, host Colchester in a week's time - when they will have returned from dreamland to resume their League One campaign.