Schalke 04 expressed interest in 19-year-old Turkish Centre-Forward Mustafa Hekimoglu, leading to a video call between the German club and Besiktas. During the discussions, Schalke proposed a loan deal that included a €5 million purchase option. Besiktas, however, demanded a higher amount, causing the negotiations to be paused. Hekimoglu's contract with Besiktas runs until June 2028, and his current Transfermarkt valuation is €5.00m. He has 7 caps and 1 goal for the Türkiye U21 team but did not make any appearances in the Süper Lig during the 2025/2026 season. Other clubs that have been linked with the player include Real Sociedad, Wisła Kraków, FC Utrecht, and Vitesse.