Manchester City will no longer face Arsenal on October 19, after the Premier League game was postponed to enable the Gunners to fulfil a Europa League fixture.
Arsenal were set to face PSV in their second Europa League group stage game on Thursday, only for that match to be called off in the wake of the death of Queen Elizabeth II.
Thursday's game was postponed due to "severe limitations on police resources and organisational issues related to the ongoing events surrounding the national mourning" of the United Kingdom's late monarch.
UEFA has now confirmed the match at Emirates Stadium will take place on October 20, with Arsenal's home match against City – which was set to take place a day earlier – postponed by the Premier League.
In a statement, European football's governing body said: "UEFA would like to thank the Premier League and the clubs concerned for their flexibility and cooperation in the rescheduling of the UEFA Europa League match which had been postponed due to the impossibility for local police forces to guarantee its secure staging."