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MANCHESTER, ENGLAND - JANUARY 22: (EXCLUSIVE COVERAGE) Alexis Sanchez of Manchester United poses after signing for the club at Old Trafford on January 22, 2018 in Manchester, England. (Photo by Manchester United/Man Utd via Getty Images)

MANCHESTER, ENGLAND - JANUARY 22: (EXCLUSIVE COVERAGE) Alexis Sanchez of Manchester United poses after signing for the club at Old Trafford on January 22, 2018 in Manchester, England.  (Photo by Manchester United/Man Utd via Getty Images)