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LONDON, ENGLAND - SEPTEMBER 24: Mesut Ozil of Arsenal is substituted as Unai Emery manager of Arsenal looks on during the Carabao Cup Third Round match between Arsenal and Nottingham Forest at Emirates Stadium on September 24, 2019 in London, England. (Photo by Julian Finney/Getty Images)

LONDON, ENGLAND - SEPTEMBER 24:  Mesut Ozil of Arsenal is substituted as Unai Emery manager of Arsenal looks on during the Carabao Cup Third Round match between Arsenal and Nottingham Forest at Emirates Stadium on September 24, 2019 in London, England. (Photo by Julian Finney/Getty Images)