Mikel Arteta wanted a show of character from a side that has lacked it, and what a reward this was. Arsenal rode an early onslaught from Olympiakos and looked set for a creditable draw before going one better, Alexandre Lacazette scoring nine minutes from time after outstanding work from Bukayo Saka and meaning they achieved what only Bayern Munich had previously managed this season: winning at a venue where stronger teams than this have withered.

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