The 22-year-old Spaniard is keen on a move to Old Trafford, after a disappointing start to the season for Atletico Madrid.
Torres is the youngest player to play for Atlético Madrid and the youngest to become captain (at age 19).
Ferguson has also been given the green light to make a £16 million bid for Bayern Munich midfielder Owen Hargreaves, by the Glazer family. The moves could see United spend £38 million in the January transfer window.