A Bola says Garay is set to join United in the summer after being linked in the Portuguese press with a move to Old Trafford for some time.
The 27-year-old Benfica centre-back is being valued in the £8million class.
Garay feared the tentative agreement with United had fallen through earlier this season after David Moyes' arrival.
"I believe the exit of (Sir Alex) Ferguson has influenced the deal. Moyes did not believe in me as much but that's not a problem.
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