Keane was forced to withdraw from the Republic of Ireland squad to face Poland after sustaining a shoulder injury in last weekend's win over Bolton.

Benitez insists the injury is not serious and admits his withdrawal from international duty was more of a precaution.

"Robbie Keane's injury is not serious," Benitez told the club's official website. "He had a problem but [withdrawing from the international duty] was just a case of prevention. I think he will be okay."

Gerrard is expected to be sidelined for between seven to 10 days with a groin problem, which forced him to pull out of the England squad to tackle Germany.

Benitez is unsure when Gerrard will be available for action, but it is expected he will miss the Fulham clash and return for next week's Champions League tie with Marseille.

"Steven had a scan and he will be out for seven to ten days, depending on how he progresses," added Benitez.

"He could be back for the Marseille game but each player is different. We have to start working with him and see how he does."

Benitez also revealed that he had spoken with the medical staff of the Spanish national team in an attempt to prevent further injuries for Fernando Torres.

Torres has only recently returned to action after picking up a hamstring strain on international duty and Benitez is keen to avoid a recurrence this week.

"We have spoken to the Spanish medical staff and they know our idea and we know that they will take care of him. They know it could be a small risk so they will try to protect him," concluded Benitez.