That's a little bit weird but Real Madrid is thinking about hiring Sergio Ramos and returning this player to Real Madrid while Sergio Ramos is getting old and he is out of good form.
In Marca, they say they need better defenders. They think playing with Alaba, Militão, and Rüdiger won't be enough for a season with 72 games and they will need more players. Since Ramos is not playing for any team, they can consider making his return and this can be a good chance for Ramos to end his career in a team like Real Madrid.
I very much doubt that this could be true, why would Real Madrid need a 38-year-old defender who has been injured quite often lately. Real's defense can cope quite well without him, and when Alaba recovers from injury, there may not even be a place for Ramos in the starting lineup. I would rather believe that Ramos could go to Messi’s team, it would look more logical, they love famous footballers and the competition is not so high. Although Ancelotti spoke very well of Ramos, I don’t believe that he is ready to accept such an old player into the team.