When comparing club soccer teams, it’s fairly easy to figure out who is the best of the best. The most talented players in the world play in a handful of European leagues, and the best teams of these leagues face off each year in the Champions League.
Judging below this level is more difficult.
How do you compare the English club Arsenal, which got through the group stage of the most recent Champions League but lost in the first round of the knockouts, with Celta Vigo of Spain, a semifinalist in the Europa League? And what about the European teams that didn’t play anyone outside their nation’s borders — like Stoke City in England and Freiburg in Germany?