Every year there seems to be a non-league team who punches above their weight and this year, it's sixth-tier Chorley. Although many think they had an easy tie against a weakened Derby side in the third round, they are definitely here on merit, having knocked out Wigan and Peterborough in the first and second round. They have now been given a big draw, as they face Premier League Wolverhampton Wanderers on Friday night at Victory Park.
After suffering relegation last season, Chorley are decent form this season as they look to bounce back to the National League under the management of Jamie Vermiglio, who is also a headteacher at a school in Warrington. The Magpies sit ninth in a tight league, just six points away from Chester, who are second.
Wolves have been poor since star striker Raul Jimenez suffered injury against Arsenal and have picked up just two points in their last six games in the Premier League. 18-year-old Portuguese striker Fabio Silva is likely to start and he undoubtedly has potential, but Silva has scored just twice in 16 appearances since signing from FC Porto and may struggle against physical opposition on a non-league pitch.
The last time Wolves played non-league opposition in the cup they lost, when they played Luton Town back in 2013 and we think Chorley could once again prove to be a difficult challenge and we predict a shock 1-0 win for the hosts.
ICYMI: Take our history of FA Cup upsets quiz right here and see how many you can get out of15!