Ferguson stunned United fans after dropping Rooney to the bench for Tuesday's Champions League defeat against Real Madrid at Old Trafford.
Now the United manager will consider selling Rooney during the summer for around £35million after failing to maintain his fitness issues over the years.
Rooney, 27, has two years left on his contract and the relationship betweenthe player and manager have been tense and shows no signs of improving.
The England international has been linked with a move to cash-rich Paris Saint-Germain but the financial issues faced by the club with Zlatan Ibrahimovic's salary could hinder any move. France has a 75 percent income tax on high earners and PSG pay four time the amount to meet Ibrahimovic's wages.
United's rivals Manchester City wouldn't miss a chance of signing Rooney. City tried to persuade Rooney in 2010 but United put forward a huge offer which prompted him to stay.
United will also look into cash plus player offers as Cristiano Ronaldo could make a dramatic return to Old Trafford, but Real Madrid are not interested. Nani, who was controversially sent off on Tuesday night, could be a possible target for Real with Ronaldo moving the other way.
Rooney is currently the highest earner at Manchester United and the club have been linked with Borussia Dortmund striker Robert Lewandowski.