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Arsenal produced a resilient performance to secure a 1-0 win over Olympiacos in the UEFA Europa League on Thursday night.
Premier League rivals Wolverhampton Wanderers also impressed in the competition, thrashing La Liga side Espanyol 4-0 at Molineux thanks to a hat-trick from Diogo Jota.
Manchester United needed an Anthony Martial equaliser to rescue a draw at Club Brugge, while Christian Eriksen scored his first goal for Inter Milan in a 2-0 win over Ludogorets.
Winners: Arsenal's defence under Arteta
Manager Mikel Arteta has tightened up Arsenal's defence since being named permanent manager in late December and saw his team keep their third clean sheet in a row on Thursday.