Arsenal had a shaky start to their game against Olympiacos, but a blunder from the Greek side's goalkeeper Roberto on an Olivier Giroud header has given the Gunners the lead after half an hour. However, Arsenal's work isn't done yet: they need to beat Olympiacos either by two clear goals, or by any margin providing they score at least three to make the knockout stages.
Olympiacos keeper blunders as Olivier Giroud heads Arsenal into the lead
Arsenal have taken the lead away in Greece, largely thanks to some poor goalkeeping.
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