Athletic Bilbao cruised to a 3-0 win over Elfsborg on Thursday to move level on points with Lazio at the top of the Europa League table, while Chelsea made it four wins from four in the Conference League.
Europa League: Real Sociedad snatched qualification for the last 32 in the final seconds on Thursday after Willian Jose's late leveller in a 1-1 draw at Napoli and AZ Alkmaar's shock 2-1 defeat at Rijeka allowed the Spanish side to progress.
Mason Greenwood scored twice in a 4-0 thrashing of AZ Alkmaar in the Europa League while Arsenal came back from two goals down to draw 2-2 vs Standard Liege.
Europa League: Arsenal thrashed Standard Liege 4-0 to go top in Group F while Manchester United stuttered to a goalless draw against AZ Alkmaar in Group L.
Fernando Llorente grabbed a brace as Athletic Bilbao proved their Europa League conquest of Manchester United was no fluke with a 4-2 win at Schalke in Thursday's quarter-final first leg.
A Dutch Cup tie between Amsterdam giants Ajax and AZ Alkmaar was dramatically halted mid-match on Wednesday after a fan ran on to the pitch and tried to assault AZ's goalkeeper Esteban Alvarado.
AZ Alkmaar are on top of the Dutch Eredivisie table after a 3-2 victory at home to NEC Nijmegen.
Dutch league leaders AZ Alkmaar staged a brave comeback against Russia's Krylya Sovetov to book a place in the group stages of the UEFA Cup.