What can Grosso teach De Ceglie?
It's not like Grosso is a master defender from whom De Ceglie can learn all the tricks of defending. Plus, you can't teach someone how to run up and down the pitch, how to cross, how to have great stamina.
I fail to see what can a fullback teach another fullback.
I understand that a young CB can learn a lot about defending from an older CB. I can understand younger players learning some tricks from Diego and Del Piero, or a young striker learning from more experienced strikers, but i really fail to see what can a LB learn from a LB.
We have reasons atm to buy Grosso, but Grosso being DC's teacher certainly isn't one of them.