The People says United are ready to offer £27million for Southampton's England left-back - but face a fight to talk him into the move.
United chief Ed Woodward is happy to meet the Saints' asking price - with a request to speak to Shaw as soon as possible. However sources close to Shaw reveal he is unsure about his next step and that is putting the switch in danger.
The 18-year-old has strong Chelsea allegiances but the Stamford Bridge move is fading - and he is now being put on the spot about joining United.
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