Champions League loss to Borrusia Dortmund reveals Arsenal weaknesses

[Jonathan Wilson]

LONDON -- Too often, the Champions League group stage is a procession, a dull stroll for the top-seeded teams into the knockout stage. But sometimes it produces groups like this one, with three excellent sides, all of whom are capable of beating each other on the day, all of whom would be worthy of a place in the last 16. When that happens, the margins are impossibly fine, the swings of emotion extreme.

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