The Daily Star reports that United are ready to make a move for the Spaniard should Wayne Rooney leave Old Trafford.
United could make a £50million swoop for the Liverpool striker.
United boss Sir Alex Ferguson is reportedly a long-term admirer of the former Atletico Madrid star.
A source close to Torres told the Daily Star: “On the face of it spending all that money on one player is something United would find hard to give the green light to.
“But they know Torres would sell shirts all over the world. It’s no secret that Ferguson wants Torres at United.”