Tuttosport reported that Koulierakis, 21, has emerged as a concrete priority. The VfL Wolfsburg centre-back was a long-standing target of former Inter Milan sporting director Piero Ausilio and is expected to leave the Bundesliga club this summer. Valued at around €25million, the Greek international offers left-footed composure and the ability to play out from the back — the profile Juventus have identified as their primary need.
Tati, 18, is a more ambitious pursuit. The Nantes centre-back, who holds both French and Senegalese eligibility, has attracted interest from Barcelona, AC Milan and Paris Saint-Germain alongside Juventus. Nantes value him at €50million after rejecting a €30million verbal offer from Chelsea in January. He is contracted until June 2028.
Coulibaly is the most competitive target of the three. The 18-year-old Werder Bremen defender has broken through in the Bundesliga this season and his club are demanding a record fee of around €42-50million. Newcastle United, Manchester United, Chelsea, Napoli and PSG are all pursuing him, leaving Juventus as one of several clubs waiting to discover where the player himself wants to go.
Werder Bremen head coach Daniel Thioune has been measured in public about the situation.
"What is best for the club and the player, I do not want to judge that. The fact is that he possesses high quality and is far from the end of his development."
The three younger names sit alongside Real Madrid defender David Alaba, who is out of contract this summer, and Manchester City centre-back Nathan Aké on Juventus's wider list of options.
Both Tati and Coulibaly are teenagers — a sign that Juventus are pursuing not just an immediate defensive solution but a generational shift in the back line. Whether the budget matches that ambition is the question Comolli must answer before the window opens.