Put your pipes down, nice win and an upset, but biggest ever? What are you out of your minds or you just don't remember that far back? Greece won their group in qualifying beating out Spain, then beat Portugal on their home field and tied Spain. They aren't exactly sneaking up on anyone. Nice win, but this team could win it all and it wouldn't be that monumental of an upset. After all it was just 8 years ago Denmark wasn't even supposed to be in the tournament and came in as a late edition and then won the thing. Greece winning it all wouldn't come close to the upset that was. And here they just won one game.
