It is hard to quantify what constitutes the biggest cup upset, but this has to rank among them. It even has the right to be debated as the greatest ever, given what a brilliant team Manchester City are, how they have dominated and where Wigan are right now. Manchester City’s hopes of an unprecedented quadruple have gone up in flames. “Will Grigg’s on fire,” was the anthem of Northern Ireland’s Euro 2016 campaign, but the striker did not feature for his country during that tournament. His contribution for Wigan, though, was immense.