Alternative Naming of Clubs: Where possible, I have added alternative acceptable names of clubs. For most clubs, "FC" is not valid. For example, if Nottingham Forest FC had played in this year's European Competitions, "Nottingham Forest" and "Notts Forest" would be accepted, but not "Forest" alone. For non-English club names, I would greatly appreciate any help you could provide as to alternative answers that could be accepted, preferably following the example above.
Qualification abbreviations: CL - Champions League; EL - Europa League; Qx - Qualifying Round x; PO - Play-off Round; GS - Group Stage. See comments for a link to country abbreviations.