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Luke Shaw has surprised Jose Mourinho and Manchester United's coaching staff by finishing top of early pre-season fitness tests.

The 22-year-old is entering the final year of his contract at Old Trafford and it's make or break time for the defender.

The left-back cut his summer plans short to train in Dubai with United's head of fitness and conditioning Gary Walker, a week before returning to pre-season.

Following his work, Shaw then posted a picture of himself shirtless on Instagram, declaring himself to be "pre-season ready".

(Image: Manchester United) (Image: lukeshaw23/Instagram)

He also responded to a fan's tweet comparing his physique to what were seen as unflattering images of him on an Ibiza holiday just two weeks ago with the words "am not finished yet".

Shaw trained for a week with his United team-mates at the AON Training Complex before they all jetted out to the United States.

(Image: Twitter)

And in that week the defender impresed.

According to the Metro , Shaw stunned United's coaching staff by finishing top of all the pre-season fitness tests.

Shaw's fitness is something that's been criticised by Mourinho in the past and it appears he's actively trying to do something about it.

United kick off their US tour on Friday with a friendly against Club America.