Arsenal will head into next week's second leg of their Champions League semi-final trailing Paris Saint-Germain by a goal to nil.
Ousmane Dembele scored in the fourth minute in North London last night.
The Gunners looked to have equalised but it was ruled out for offside.
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Arsenal manager Mikel Arteta insists his team are still in with a chance of reaching the Champions League final.
This evening, Barcelona host Inter in the opening leg of their final-four clash.
