Manchester United detected a minor back injury before Sofyan Amrabat’s medical was completed, according to The Athletic.
The Morocco international joined the Red Devils from Fiorentina on transfer deadline day on a season-long loan with an option to buy.
Amrabat struggled with his back during the World Cup last year, and he had to receive pain-killing injections to play in the round of 16 against Spain.
Man United arranged for a private jet and a prospective medical in Pisa in case a breakthrough could be found during negotiations to sign the 27-year-old on Friday, and they went ahead with the deal as the current back issue was not considered serious.
The Red Devils parted with a €10million loan fee for his services and also secured a €20m option to buy rather than an obligation to buy.
Amrabat played 29 games in Serie A last term and has not been affected by the injury since the World Cup ended.
He is yet to taste action this term but was involved in pre-season training and could be available for selection immediately after the current international break.
Man United could not have Rasmus Hojlund available for selection shortly after he joined them from Atalanta earlier this summer due to a back injury he sustained in pre-season.
He finally made his debut against Arsenal on Sunday, but Red Devils fans have nothing to fear concerning Amrabat, and he could taste action when they host Brighton and Hove Albion at Old Trafford on September 16.
The defensive midfielder only wanted to join Man United despite several attempts from other clubs to sign him during the closing stages of the transfer window, and he eventually got his wish.
Amrabat will be eagerly anticipating making his debut and will be keen to hit the ground running, and the Red Devils believe they have landed a top player capable of making their side better.
