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Manchester United centre-back Phil Jones was substituted early after suffering a knock during the club's home game against Hull City in the Premier League at Old Trafford on Wednesday.
News of the problem came from United's official Twitter account, although specific details about the injury weren't revealed:
Simon Stone of BBC Sport noted the former Blackburn Rovers ace made a speedy exit from the pitch, a possible sign the injury is a bad one, as he was replaced by fellow England international Chris Smalling:
Speaking of the England national team, Jones has been showing form worthy of selection.