REUTERS/David Klein

Man United have been handed a severe blow as key midfielder Nemanja Matic looks doubtful against rivals Arsenal in the weekend.

Manager Jose Mourinho confirmed after the tie that Matic has suffered an injury in the clash versus Watford, after he was replaced by Ander Herrera near the hour-mark at Vicarage Road.

Matic waved towards the United dug-out and soon asked to be taken off as he sat on the ground. Mourinho did not take any chance and replaced him immediately with Spaniard Herrera.

The Portuguese revealed that Matic could have a muscular injury as he seldom asks to be replaced.

“For Matic to tell me he wants to be replaced, he does not do that if it is nothing important. It is muscular,” said the United manager.

READ MORE: Player Ratings: Watford 2-4 Manchester United

The former Chelsea player, who joined United thus summer, has been in commanding form and has looked at ease in the set-up chosen by Jose.

It was again evident against Watford as his presence as a cover for the defenders helped Paul Pogba to wander forward and create an impact. Till the time Matic was on the ground, United did not concede and only after he was taken off, the club gave away two goals before scoring again to take a 4-2 win.

Matic figured in every game for United in the Premier League this season and prior to the Watford tie had played every single minute. United will hope they can get the Serbian international ready before the tie against Arsenal. United are…

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