I think Lucumi would be a better option and more realistic target for us.
He's in the last year of his contract and still 26, and rumor says he is available for around 18 million euros.
He is a left-footed centerback who fits well with Bastoni's left-center-back (LCB) position. He can also play center CB if needed.
We have seen how vulnerable our defense can be overwhelmed when Bastoni is taken out of the game.
We need more solid defenders on the team.
Carlos Augusto did a good job in this position, especially when going forward. But I think he is a better player in his original position, as left wing-back.
Lucumi is also good with the ball. His calmness and composure would be a great fit for our gameplay, and his successful take-ons would also be a great addition.
There aren't many left-footed CBs out there who are as good as or better than Bastoni when it comes to these stats or just the successful take-ons.
There are some interesting names like Nico Schlotterbeck, Castello Lukeba, and Micky van de Ven, who might have some similarities to Bastoni, but none of them seem realistic.