The INEOS chief, who now owns 25 percent of the club, wants to know why the team has struggled so much this season to keep players fit.
The crisis has particularly impacted the team's defense, with nearly every senior center half currently absent.
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Per The Mirror, United blame injuries for not being in a better Premier League position.
Unless the club turns around its form, they may miss out on all European football for next season.
United are currently pushing to try and qualify for the Europa League or Conference League.