England defender Luke Shaw has started his rehabilitation at Manchester United's training ground but manager Louis van Gaal is dampening expectations that he might have recovered from a broken leg in time to play at Euro 2016.

Van Gaal expressed his admiration for 20-year-old Shaw who suffered a traumatic double fracture of his right leg against PSV Eindhoven in the Champions League earlier this season.

'He is already here every day, walking with a brace and starting his rehabilitation. It is unbelievable,' said Van Gaal.

Manchester United defender Luke Shaw is expected to have a second operation on his broken leg on Friday

The £27million defender, who had been in sensational form, suffered the shocking injury in the 15th minute

Shaw had burst past two defenders and into the penalty box when he was caught by PSV defender Moreno

'But he has a long way to go. At the moment, the progress is steep, but at the end it will be flat and that is difficult to maintain your mentality. But now he is fantastic.'

The United boss won't rule out Shaw's participation at the European Championship but made it clear the seriousness of the injury makes it a big challenge.

'You can not say that now he can go,' said the United boss. 'Like Roy Hodgson says 50-50 because it is possible, but it is dependent on the rehabilitation.

'Maybe there are complications, you never know, that happens a lot so we have to wait and see.'

Luke Shaw looks in agony as he lies stricken following his season-ending injury sustained in September