Martin Skrtel has enjoyed his defensive partnership at Liverpool with Dan Agger.
The pair have started the last 11 league games alongside each other and Skrtel believes that his Danish teammate is one of the best in his position in England.
"Daniel is a great player," Skrtel told liverpoolfc.tv. "I see him as one of the best centre backs in the Premier League. It is very important that he is fit now because in the past he has been unlucky with injuries.
"I hope he will be fit for a long time. I enjoying playing alongside him, the partnership with him and the understanding on the pitch with him is working. It is very good and I hope it will continue.
"Of course, we know we have to work and play well if we want to keep our place in the team.
"Carra is a great player and has played here for so long. It is a question for the manager who is going to play. I just try and do my best and if the manager picks me I am happy for that and I will try and play well."