Ferguson is convinced Torres started last night due to his hefty price-tag.
Ferguson said: "A lot of people thought Drogba would play. I thought having signed Torres for the money they did they had to play him.
" I wasn't 100 per cent sure but I couldn't see how they could leave Torres out."
"They had the opportunity to sign Torres and I don't think anyone would have turned it down," Ferguson said. "Everyone said at the time it was fantastic business. You can't criticise him (Ancelotti) for that, it was a good signing. It isn't working at the moment but he is a young man and there are other seasons ahead.
"Torres has played against us quite a few times and he had a little goal spell at Old Trafford and got a goal at Anfield but we've actually done all right against him.
"It's made out that he's tortured us. He's a good player but with (Nemanja) Vidic's experience and (Rio) Ferdinand's experience they should be able to handle the best players in the world. They are in that sphere of being top players themselves."