The third round of the FA Cup is renowned over the years for throwing up some of biggest shock results in English football history. It is the round where the big guns enter the competition's fray and the lesser lights look to make some headlines. While the glamour of the FA Cup has diminished somewhat in recent years as clubs prioritise league position over knockout glory, it still remains one the most famous trophies in world football. Looking at this season's fixture list, third-tier Bristol Rovers will be fancying their chances at home to winless Premier League side Sheffield United on Saturday. Sixth-tier Chorley will be taking on Wayne Rooney's Derby County side that is set to be made up of youth-team players after an outbreak of Covid-19 at the Championship club. While on Sunday, if eighth-tier Marine manage to defeat Jose Mourinho's Spurs, you can safely say that a new name has been firmly etched into FA Cup history. The same can be said if fourth-tier Morecambe claim the scalp of Chelsea and Frank Lampard's squad of superstars at Stamford Bridge. In the above gallery, we have picked out 15 of the biggest FA Cup third-round shocks. To move on to the next photo, click on the arrows or if using a mobile device, simply swipe.