Marcos Rojo, Morgan Schneiderlin and Bastian Schweinsteiger are three players manager Jose Mourinho is ready to sell to finance the signing of Paul Pogba.
The Frenchman is expected to become the fourth and last summer signing for the Red Devils this summer.
The three players who can leave the club according to the Portuguese have endured a very disappointing campaign at Old Trafford last season.
Mourinho has already signed defender Eric Bailly, midfielder Henrikh Mkhitaryan and striker Zlatan Ibrahimovic.
And at the start of the week he revealed that he wants to finalise a fourth signing before the end of the month.
"We decided four targets," Mourinho told reporters.
"Until we have the fourth, we are still working hard. The third player will be official soon.
"For many years, success was just routine and in this moment the last three years are to forget. I want the players to forget. I don't want the players to think we have to do better and finish fourth. Finishing fourth is not the aim.
"I want everything. I want to win matches, I want to play well, I don't want to concede goals. I want the fans to be behind us.
"Of course, we're not going to get everything, but we want to."