While he may not be the most vocal on the pitch, Agger believes he has done - and will do - plenty in terms of leadership but admits he cannot replace Carragher.
"Jamie speaks for himself. To be at that level for that long, it's not impossible but really close," he said.
"You learn from every single player you play with in training. If you want to be the best you have to learn from the best.
"I don't think you have to replace him because every footballer is not the same. Every person is different.
"When someone steps down, someone else has to take over. I play the way I do. I am the person I am and I'm doing the things I'm doing and I won't really change.
"I am taking the responsibility I need to take. I enjoy it and there are a few players who are taking a lot of responsibility."