Toni Kroos and Luka Modric left a vacuum at Real Madrid's midfield that needs critical attention, and the club need to find a player suitable replacement who can match their playmaking abilities and tactical display, because both player had a key role in the Madrid’s squad, which to actually find a player of their kind, it will be a bit difficult thing and I think that's where the problem of Madrid currently lies, their frontline is quite good, and they obviously do not have much of problem in their defends side.
Real Madrid have no option, they need to spend at least 100 Million Euros because they want to sign top midfielders.
Players like Vitinha, Rodri, Enzo, Caicedo etc, they're top tier midfielders and they're key players in their own teams. First Real Madrid wants Vitinha, then PSG reject it. Then Real Madrid now show an interest to sign Enzo, but Chelsea ask at least 130 Million Euros. Real Madrid is trying to sell few players to get the money.
I think Enzo likely will be the new midfielder for Real Madrid, if they want Caicedo, they would target Caicedo first than Enzo.