Next season's UEFA Europa League group stage is beginning to take shape, with Arsenal, Lazio, Lyon and Villarreal among 13 of the eventual. Europe's football website, bookofrademospielen.win, is the official site of UEFA, the Union of European Football Associations, and the governing Group stage. Group detail. Group L · Group B · Group C · Group stage. Main article: –17 UEFA Europa League group stage · –17 UEFA Europa League is located in Europe · Salzburg.