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That’s the opinion of Red Devils legend Paul Scholes.
The former Southampton defender made his seventh appearance of the season in Tuesday’s 2-1 Champions League win over CSKA Moscow.
Shaw has been plagued by injuries over the past few seasons and manager Jose Mourinho has publicly criticised the 22-year-old on several occasions.
But Scholes is convinced there’s still a chance for him at Old Trafford and has compared his fitness issues with one of his former colleagues.
“It’s difficult to say, we don’t see what goes on behind the scenes,” he said.
“I don’t think he lives his life as clean as he possibly should do. He looks like a player who needs to be playing every week.
“We had Wayne Rooney who was a player who missed a couple of games and you knew he’s not looking after himself right.
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“A couple of years ago I thought he was possibly the best left-back in the world.”
Man Utd legend Paul Scholes
“He needs to be playing all the time, he needs to be playing Saturday Monday, Saturday Tuesday, whatever it may be and I think Luke Shaw’s exactly the same.
“Can he get a run of 10 games in the team? I’m not sure what the problem is. Ashley Young’s done so well at left wing-back.
“You’d have to think there is a future for him, I hope there’s a future for him.
“A couple of years ago I thought he was possibly the best left-back in the world.
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“He’s had injury problems, he’s had fitness problems. If you get him playing I think there’s a chance for him.”
United qualified for the Champions League knockout stage top of Group A and the win will give them confidence as they prepare for Sunday’s crucial Premier League clash with fierce rivals Manchester City (4.30pm).