#2 Saul Niguez (Atletico Madrid)
The young midfielder, 23, would be a perfect addition to Ernesto Valverde's squad having proven he has what it takes following a fine campaign so far for Los Rojiblancos.
Niguez was previously subject to interest of Manchester United which were keen to secure his services previously, with Jose Mourinho said to be a keen admirer.
Be it in a defensive midfielder position, as a winger or even as a playmaker, he has played in a variety of positions for Atletico this season and has been very effective, becoming a force for Diego Simeone's side.
The Blaugrana should look no further when they seek a ready-made replacement for the 33-year-old Andres Iniesta. It is still unknown where he would want to play his football in the future, but Barcelona may have to cough up a staggering €70 million to secure his signature.