But the France midfielder could have joined City last summer.
However Spanish newspaper Marca say the bid from City came in too late.
Pogba had begun training with Juventus and then decided to stay for another year.
but United have moved for Pogba before his return to Juve following Euro 2016.
He is understood to have undergone medical tests in Los Angeles and will be confirmed as a United player in the coming days.
GETTY
Paul Pogba rejected Manchester City last summer
He will sign a five-year deal worth around £275,000-a-week and become United's second-highest earner after captain Wayne Rooney.
Pogba left United for free in 2012 after a fall out with Sir Alex Ferguson over playing time and wages.
But he returns as part of Jose Mourinho's overhaul and the fourth signing of the summer.
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