if the budget is there to sign Sanchez, we should use it on defenders. That has been the glaring weakness all along. Perhaps this might focus a few minds now.We now have two options.
Use Maffeo/Dinho as back up RB, which is probably what will happen. Alves's seeming availability was a one off, we are not going to get someone else as good as him on a free.
Or drop interest in Sanchez and buy two top quality RBs.