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ROMFORD, ENGLAND - JULY 05: Slaven Bilic of West Ham United arrives for the first day of pre-season training at Rush Green on July 5, 2017 in Romford, England. (Photo by Avril Husband/West Ham United via Getty Images)

ROMFORD, ENGLAND - JULY 05:  Slaven Bilic of West Ham United arrives for the first day of pre-season  training at Rush Green on July 5, 2017 in Romford, England.  (Photo by Avril Husband/West Ham United via Getty Images)