Gerrard admitted he was disappointed Ferdinand had withdrawn but refused to comment on the player's decision.
"I don't think it's for me to comment. That's something for the manager to deal with to be honest. I just look at the players in the squad and worry about them players really.
"Of course it's disappointing Rio's not here, because he's a fantastic player and he's in top form, and it would've been nice for him to be here, but he's not, we move on without him and training's been really good."
Asked if England can cope without Ferdinand, Gerrard said: "Yes I do, certainly on the evidence I've seen in training the last few days.
"Repeating what the manager said, the four guys have been working hard and training well and they are all pushing for places.
"I'm confident that they can not only do the job tomorrow but on Tuesday night as well."