Torres looked a long way from match fitness as Liverpool were held to a 1-1 draw in Lyon on Wednesday night which takes their hopes of progress to the Champions League last 16 out of their hands, and Benitez admitted the player is still feeling pain from his groin-related injury.
"Fernando played with pain, and after the game he still had the same problems that have troubled him for a few weeks," said Benitez.
"He wants to wait, rather than have an operation. He wants to work with the physios to try to solve his problems, but still he has pain.
"He told me he needed to keep stopping during the game because of the pain. Whether there is the need for him or Steven to have an operation is a decision we will probably not take straight away.
"We must see how they can improve, and by how much. Then we will decide about any possible operation."