The FA Cup never ceases to shock and whilst many pundits were predicting all eight quarter-final berths would be taken by Premier League sides - they were well of target.
The biggest shock on a day of shocks came in the lunchtime game, when non-league Lincoln City scored a last gasp winner to knock out Premier League side Burnley. Burnley boss Sean Dyche played a strong side but just as the game looked to be heading for a replay, goal line technology showed that Sean Raggett's header had crossed the line.
Lincoln became the first non-league side in 103 years to reach the FA Cup quarter-finals. For older Burnley fans it brought back memories of a shock defeat to then non-league Wimbledon in the 1970s.
Middlesbrough saw a two goal lead disappear as Oxford City scored twice in three minutes and just as another shocked looked likely Boro' scored a late winner to take the tie 3-2.
Claudio Ranieri, with one eye on next week's Champions League game, made wholesale changes to his Leicester City side and just when it looked like his struggling side would take Millwall to a replay they popped up with a late winner to become the only League 1 side in the last eight.
Manchester City. despite being long odds-on couldn't find a way past resolute Huddersfield Town who will now have a chance to show their stuff at the Etihad Stadium in ten days.
The only game of the day that seemed to go to script was Chelsea who won 2-0 at Wolves.
Now its the turn of Blackburn at home to Manchester United and Sutton at home to Arsenal to see if they can add to the catalogue of shocks. Spurs will not be relishing a trip to Fulham either.