Steve Bould is considering his options at Arsenal.
The Daily Mail says concerns are emerging over manager Arsene Wenger's working relationship with assistant manager Bould, who only joined the coaching set-up in the summer.
Sources claim Bould has become increasingly marginalised during the club's training sessions in recent weeks.
It is believed Bould, who replaced the retired Pat Rice as assistant manager at the end of last season, has grown frustrated at his lack of input into first-team matters.
Meanwhile, certain players are also understood to want more regular defensive-based training sessions.