Ireland club Dundalk beat BATE Borisov to advance in Champions League qualifying, while Ludogorets Razgrad won a thriller vs. Red Star Belgrade.
Shakhtar Donetsk began their Champions League campaign with a 2-0 win over Young Boys in the third qualifying round on Tuesday.
Welsh champions The New Saints bowed out of the Champions League as Cypriots APOEL turned in a powerful second-leg display.
Brendan Rodgers' first game with Celtic ended in a humiliating 1-0 loss to Gibraltar's Lincoln Red Imps in the first leg of their Champions League tie
Dinamo Tbilisi will ask UEFA to investigate an Azerbaijani team after its fans allegedly burned the Georgian flag at a Europe League game.
Irish champions St Patrick's are out of the Champions League after a 5-0 defeat saw them lose 6-1 on aggregate to Legia Warsaw in the second qualifying round on Wednesday.
St Patrick's were denied a shock Champions League victory over Legia Warsaw after conceding a stoppage-time equaliser in the first leg of their Champions League second qualifying round in Poland.