Team news - Nketaih starts for Gunners; Hojlund on bench for Man United
Arsenal v Manchester United (16:30 BST)
Arsenal make three changes from the side who drew 2-2 with Fulham - with Thomas Partey missing out through injury.
Gabriel, Oleksandr Zinchenko and striker Eddie Nketiah replace Jakub Kiwior, Partey and Leandro Trossard.
Takehiro Tomiyasu is on the bench after recovering from suspension.
Arsenal: Ramsdale, Gabriel, White, Saliba, Zinchenko, Odegaard, Rice, Havertz, Saka, Nketiah, Martinelli.
Subs: Tomiyasu, Jesus, Smith Rowe, Kiwior, Jorginho, Vieira, Raya, Nelson, Trossard.
Manchester United make one enforced change from the side who beat Nottingham Forest 3-2 - Victor Lindelof replaces the injured Raphael Varane.
Potential debutants Rasmus Hojlund, Altay Bayindir and Sergio Reguilon are all on the bench - as is Jonny Evans.
Manchester United: Onana, Wan-Bissaka, Lindelof, Martinez, Dalot, Casemiro, Eriksen, Antony, Bruno Fernandes, Rashford, Martial.
Subs: Bayindir, Maguire, Hojlund, Reguilon, Garnacho, Pellistri, Evans, Gore, Hannibal.