Marouane Fellaini’s proposed loan move to Napoli is in doubt after the Belgian was pictured on crutches following a reported training ground injury.

Manchester United are yet to comment on the extent of the injury, but it is expected to hit the club’s intention to off-load the midfielder to the Serie A side before the end of the month.

Photos of Fellaini showed the 26-year-old on crutches with his left foot in a protective cast.

New United boss Louis Van Gaal has made it clear he does not see a future for Fellaini at Old Trafford despite mounting injury problems at the club.

Michael Carrick is already ruled out for around two months with an ankle injury, leaving Ander Herrera, Tom Cleverley and Darren Fletcher as United’s only fit central midfielders.

Fellaini has endured a disappointing career at Old Trafford since his £27.5m move from Everton last summer.

He appeared as a substitute in Saturday’s Premier League defeat to Swansea, re-placing Herrera for the last 23 minutes of the match.

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