Arsenal players believe manager Arsene Wenger is giving Mesut Ozil special treatment.
The Daily Mail says factions in the Arsenal dressing room feel the German has received preferential treatment from Wenger.
Wenger admitted after Saturday's 2-0 victory over Hull City that Ozil appears low on confidence and has recently fallen short technically.
Some team-mates are also believed to be disappointed by Ozil's level of application, particularly by his failure to challenge Ashley Williams at a defensive set-piece when Arsenal conceded late to lose at Everton in December.
Tame performances in losses at Manchester City and Chelsea also raised eyebrows.
Ozil has always been a private individual but his distance from other players has been accepted because of his quality on the field.