Daniel Alves is not a midfield player, he is a right full back (yes he is good in attack.) But also, be serious, he is on theverge of signing for Barcelona, he wants to transfer there. The only way we would get him now is if the transfer falls through, and we do a Chelski-esque swoop for him, he would also be overpriced.
Sorry to burst your bubble, but be realistic. £20M for a right back, far too expensive.