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LONDON, ENGLAND - SEPTEMBER 25: Alexandre Lacazette scores his and Arsenal's 2nd goal from the penalty spot during the Premier League match between Arsenal and West Bromwich Albion at Emirates Stadium on September 25, 2017 in London, England. (Photo by David Price/Arsenal FC via Getty Images)

LONDON, ENGLAND - SEPTEMBER 25:  Alexandre Lacazette scores his and Arsenal's 2nd goal from the penalty spot during the Premier League match between Arsenal and West Bromwich Albion at Emirates Stadium on September 25, 2017 in London, England.  (Photo by David Price/Arsenal FC via Getty Images)