"It hasn't really sunk in yet. It is not something I've been thinking about to be honest but it is a big game and now it is about preparing for that and making sure I am focused and ready," he said.
"These things can happen, as it proved for Doni coming in a couple of days ago (against Aston Villa).
"You just have to be prepared and have it in your mind that it could happen at any time.
"That is the thing being a goalkeeper on the bench - it could happen but 99% of the time it doesn't.
"It's going to be a big occasion against Everton. I have to make sure I do the right things and it's going to be an extra special day.
"It's massive just to be a Liverpool player. I'm as proud as anyone to do that and be part of this club."