Sport Bild reports that Hamburg's entitlement stems from Coulibaly spending six years in their youth system before joining Werder on a free transfer in 2024, with a nominal compensation payment of €70,000 paid to the Hanseaten at the time. Under UEFA's training compensation rules, a percentage of any future transfer fee flows back to clubs involved in a player's development between the ages of 12 and 23, giving HSV a meaningful slice of what is shaping up to be a landmark deal.
Coulibaly has established himself as one of the outstanding young defenders in the Bundesliga this season, making 22 league appearances for Werder having broken into the starting lineup under head coach Daniel Thioune.
His blend of aerial authority, ball-carrying from the back and composure under pressure has drawn comparisons to a generation of elite modern centre-backs capable of driving out of defence in the manner demanded by top European clubs.
Werder's asking price has been set at €40-50 million — a figure that would shatter the club's transfer record — and the club rejected a €20 million approach during the January window.
Among the clubs tracking Coulibaly are Borussia Dortmund, Paris Saint-Germain, Newcastle United, Manchester United, Chelsea, Real Madrid and Napoli. PSG are understood to be the player's preferred destination, though their existing defensive depth makes immediate first-team football there uncertain.
Coulibaly's contract with Werder runs until 2029, giving the Bundesliga club full negotiating control. He is eligible to represent both Germany and Ivory Coast at senior level. His departure appears inevitable — the question remaining is only which club meets Werder's valuation.