Bantams boss Phil Parkinson knows City will have it all to do if they wish to cause another cup upset this weekend - but he says that won't stop his side from giving it their best shot.
Parkinson's men entertain Premier League side Sunderland this Sunday at a sold out Coral Windows Stadium looking to secure a spot in the F.A Cup Quarter-Finals for the first time in 39 years.
Visitors Sunderland - currently 38 places higher that City in the football pyramid - will understandably go into the tie at Valley Parade as favourites given their top-flight status.
Following their mind-blowing victory at Chelsea in the previous round though, City could be forgiven for dreaming about causing another shock come Sunday.
And if the Bantams are to make the impossible possible once more, Parkinson knows City will have to come out attacking.
Parkinson said: "We are up against a good side but our aim, as always, is to put in a good performance.
"We have set ourselves high standards in this competition and we want to continue that.
"It will be such an occasion. The crowd is set to be the biggest the club has seen in a very long time and we have to embrace that atmosphere.
"We naturally take confidence from the Chelsea victory but we also have to remember that we are still very much the underdogs. We will certainly be going into the game with that mentality.
"To put it into perspective, one of Sunderland's mid earners probably takes home more than our squad put together.
"It is a huge gulf but the job of myself and the rest of our coaching staff is to try and make sure that gulf isn't too obvious come match-day. The only way we can do that is by the standard of our performance on the day.
"I think no-one truly expected us to beat Chelsea in the previous round so this game is a bonus one for everyone at the club.
"We are obviously keen to give a good account of ourselves but we know we will have to play to the very best of our ability and hope Sunderland have an off day.
"We've just gone one kick away from two wins in three days against tough opponents in Port Vale and Milton Keynes Dons so the lads are in great shape and have prepared properly and professionally for this match.
"I saw them (Sunderland) play against Fulham (F.A Cup Fourth Round replay) and they performed very well on the night. Equally though, we know we have to attack them and be positive.
"I think everybody knows we are at our best when we play with attacking intent and we take the game to the opposition."