Arsenal shareholder Alisher Usmanov has claimed boardroom politics are to blame for the club's lack of trophies in recent years.
The Russian billionaire is the club's second-biggest shareholder behind American Stan Kroenke and has already criticised the board in an open letter last month.
Usmanov has now told Forbes Magazine that decision-making at the top is denying Arsene Wenger the support he needs to win a first trophy since the 2005 FA Cup.
Usmanov said: "We do not consider just qualifying for the Champions League to be the chief ambition of the club, and with all our hearts we support the team and wish them well for the new season.
"Victory is absolutely not ruled out, but the current politics of the club's management will leave Arsene Wenger and his team with fewer and fewer opportunities in the long run."
Despite his unhappiness with the direction in which the club is going, Usmanov insists he has no plans to end his association with the Gunners.
"I am a fan and I am not going to sell these shares at any time, since this is the club that I consider the best in the world," he added.