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MANCHESTER, ENGLAND - AUGUST 05: Chris Smalling, Jesse Lingard and Marcus Rashford of Manchester United in action during a first team training session at Aon Training Complex on August 5, 2016 in Manchester, England. (Photo by John Peters/Manchester United via Getty Images)

MANCHESTER, ENGLAND - AUGUST 05:  Chris Smalling, Jesse Lingard and Marcus Rashford of Manchester United in action during a first team training session at Aon Training Complex on August 5, 2016 in Manchester, England.  (Photo by John Peters/Manchester United via Getty Images)

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MANCHESTER, ENGLAND - AUGUST 05: Zlatan Ibrahimovic, Manager Jose Mourinho and Timothy Fosu-Mensah of Manchester United in action during a first team training session at Aon Training Complex on August 5, 2016 in Manchester, England. (Photo by John Peters/Manchester United via Getty Images)

MANCHESTER, ENGLAND - AUGUST 05:  Zlatan Ibrahimovic, Manager Jose Mourinho and Timothy Fosu-Mensah of Manchester United in action during a first team training session at Aon Training Complex on August 5, 2016 in Manchester, England.  (Photo by John Peters/Manchester United via Getty Images)