In my first season (january) with Liverpool, and although Agger, Skrtel and Coates are all fairly good, I'm looking to sell Skrtel and get a world class defender. I tried Hummels, and considering Dortmund was interested in Skrtel it seemed too good to be true - which it was. He wasn't interested in discussing a contract.
I've looked into other possibilities, such as Papadopoulos, Varane and Zouma, but I can't decide. Zouma is obviously a beast according to other threads here, but by selling Skrtel I would have only Agger as an experienced defender. I'd prefer getting a defender who's already top class and could go right into the starting eleven. Also, considering I play a very offensive tactic with a high defensive line, someone with decent pace would be preferred.