Ola Aina is in recovery after successful surgery to a hamstring injury sustained on international duty with Nigeria.
Nottingham Forest's plans for Ange Postecoglou's attacking style have suffered an early blow, with Ola Aina ruled out for three months due to a hamstring injury.
Mikel Arteta says Arsenal's new signings are helping the Gunners become "more unpredictable" as five new arrivals impressed in a 3-0 win over Nottingham Forest.
Arsenal continued their strong start to the Premier League with a commanding 3-0 victory over Nottingham Forest at the Emirates, sealing a second straight home win of the season.
Arsenal have been handed a timely lift ahead of their Premier League clash with Nottingham Forest on Saturday, with several players returning to training at London Colney.
Ange Postecoglou has vowed to restore Nottingham Forest to the top level of English football after being confirmed as the club's new manager.