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Wayne Rooney fears he is out for up to six week with a knee injury.

Manchester United are concerned the England captain will be out until the end of next month in a massive blow for club and country.

Rooney did not travel with the rest of the United squad for the Europa League tie at Midtjylland tomorrow night.

England boss Roy Hodgson and the FA will be desperate to know the full extent of the problem.

Rooney did not appear to suffer the injury during Saturday’s defeat at Sunderland and must have done it subsequently in training.

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England have friendlies next month with Germany and Holland but that will not be the biggest concern for Hodgson.

Hodgson will be worried that Rooney has enough time to get his full fitness and sharpness back ahead of the Euros.

United will be equally concerned that Rooney is one of their best hopes of getting them back into the top four and also winning some silverware as they are still in Europe and the FA Cup.

(Image: Getty)

Rooney suffered a metatarsal injury before the 2006 World Cup and struggled to get his fitness back in time for the tournament.

England will be hoping that Rooney is not left in the same situation again this time around.

The 30-year-old was almost lost for words as United's season went from bad to worse at the Stadium of Light on Saturday.

Rooney could hardly hide his disappointment at yet another defeat in a wretched United season.

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"I didn't think we created enough chances, weren't aggressive enough," said Rooney. "Disappointing result.

"It'll be difficult to quality for the Champions League in the top four now. We know that. It's a sad day for us. We have to somehow move on.

"I think we didn't play well today, we know that. We didn't win enough second balls. It's not good enough."

Louis van Gaal's men are six points adrift of fourth-placed Manchester City in the battle for the Champions League spots.