Mikel Arteta admitted Arsenal are in a "really dangerous circle" but has denied overtraining his players as the club's injury crisis heightened with teenager Max Dowman ruled out "for weeks."

Arteta said 15-year-old Dowman suffered an ankle injury during a behind-closed doors friendly on Saturday.

The teenager has been withdrawn from Arsenal's Champions League squad, meaning he cannot play in the competition again until the knockout stages.

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Leandro Trossard has not travelled to Belgium for Arsenal's league phase match against Club Brugge after he sustained a

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