Ibrahimovic took his own personal physio with him when he signed for the club in 2016.
And United players reportedly asked the former PSG and Barcelona star to use Fort as well.
Ibrahimovic always gave his blessing, though, and no United player dare go behind his back.
Meanwhile, former United star Wayne Rooney has lauded Ibrahimovic.
Zlatan Ibrahimovic is welcomed to LA Galaxy
GETTY
Zlatan Ibrahimovic: LA Galaxy have signed the former Manchester United star
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The duo spent last season together where they struck up a deadly partnership.
And Rooney said: “Good luck to Zlatan Ibrahimovic in the next chapter of his career.
“One of the biggest characters I have played with.