Liverpool have discovered with their own scan that Gerrard's groin injury is worse than England realised. Torres has a similar problem.
Benitez hopes the pair will have recovered to face Lyon at home in the Champions League on Tuesday, but clearly that is also in doubt.
The Reds manager said: "Both are not ready yet, but hopefully (they will be available) for the next game against Lyon. The physios are working very hard on them.
"We have quality in the squad and we will have to manage with different players and a different style.
"It is always difficult to keep all of your players fit in international breaks, but there is nothing we can do about the situation, we have to cope with the outcomes.
"I would prefer to see internationals played on a Tuesday to give players the chance to get back for the next Saturday, or if it is a double-header the games should be on Wednesday first with the second game on the Saturday. That gives everyone more chance."