It is one of the biggest upsets of recent years when League One Bradford City produced a thrilling comeback on what were the Premier League champions to be. It looked to be a routine win for Chelsea early on as they had a 2-0 lead in the 40th minute, but it was all downhill from there for the Blues in what is to this day, arguably Chelsea's worst defeat of the 21st century in the FA Cup.
Bradford started their comeback just before half-time when Jon Stead halved Chelsea’s lead going into the break. Jose Mourinho's men kept their lead for most of the second half, but a late onslaught by the visitors produced the upset, as an equaliser in the 75th minute and goal in the 82nd minute put Bradford ahead.
They then went on again to score in the 94th minute to cap off an all-time classic game in the FA Cup. Mourinho barely ever lost at Stamford Bridge, and losing to a League One side who hadn't been past this round in 18 years is even crazier.