Neymar
The Brazilian is one of Madrid's key targets, although it is not yet clear if he could make the move this summer. Depending on what happens with Ronaldo at Real, Neymar will be focused on Brazil's World Cup campaign, but not without keeping tabs on the transfer market.
Christian Eriksen
The Danish midfielder is his country's greatest footballing asset and has excelled at Spurs. Barca have been following him for a long time, given that his style of play fits perfectly with their own.
Alisson
The departure of Zidane opened a wealth of new opportunities in the Madrid goal. Keylor Navas is no longer untouchable and Alisson is well-respected by 'Los Blancos', however his current club, Roma, will not make it easy for him to leave.
Aleksandr Golovin
The midfielder is a source of great pride for Russia. Barcelona have set their sights on him and an impressive World Cup campaign so far could open plenty of doors for the CSKA Moscow star.
Juan Fernando Quintero
Madrid could repeat with Quintero what they did with James four years ago. The attacking midfielder plays for River Plate on loan from Porto and has emerged as one of the stars in Russia.
Hirving Lozano
One year in Europe, three World Cup matches and the Mexican's name is already on everyone's lips. The competition will be fierce to sign him, but Barcelona are the current frontrunners.
Eden Hazard
The Belgian has been gunning for Real Madrid for a while now, although this year things seem a little simpler. It will depend on whether Chelsea can keep a hold of their forward after the summer.
Willian
He is not quite having the World Cup that he expected with the Brazilian National Team, although it won't prevent Barcelona from continuing to sniff around, with rumours of a €56million offer.
Hector Herrera
Julen Lopetegui already knows the Porto midfielder well, something that would help to open the doors of the Bernabéu. Herrara is a player who doesn't generate endless headlines, but is well-respected in the Portuguese league.
Sergej Milinkovic-Savic
Lazio knows that they have a particularly strong bargaining chip on their hands, and they will intend to make the most of it. Lazio are expected to ask Barca for around €170million for the Serbian.