Torres has been in sparkling form of late and looks likely to lead at Reading on Saturday and then again against Marseille and Manchester United in the coming week.
Benitez said: "It will be difficult at Reading because they are very strong, physically. It will be hard for everyone but especially the strikers.
"Torres is strong enough, and also he has ability and good movement so I believe he can handle the physical side of the game.
"Marseille may well be three days later and it could be a risk playing him at Reading, but he has such good movement that I believe it will be difficult to control him at Reading and he will be fine for the Champions League.
"Torres has rested for a month, anyway, with an injury, so we know now that we can use him. The key for me is that when you play two games a week at this stage of the season the players are fit and can handle it.
"Some players can recover from games quicker than others. If players are older then it is not always as easy, but Torres can now cope with two games a week."