
The background to the ban is a dispute between Hakan Calhanoglu and the Turkish club Trabzonspor. During his time at Karlsruhe SC in 2011 Calhanoglu, as a minor, reached agreement with Trabzonspor regarding a transfer. However, he extended his contract at Karlsruhe SC and later joined Hamburg SV. The CAS agreed with FIFA that the actions of the player represented a breach of contract with Trabzonspor.
Bayer 04 Leverkusen were not involved in the proceedings as the player signed for the Bayer 04 Leverkusen several years after the incident. "Of course, we regret this decision which is completely incomprehensible for us," said sporting director Rudi Völler. "It's a heavy blow for Hakan but also for us. We’re also being heavily punished although Bayer 04 Leverkusen had nothing to do with the events in 2011. We are now missing a very important player in a crucial phase of the season."
Bayer 04 CEO Michael Schade also criticised the verdict. "In addition to the player, it also affects the club that played absolutely no part in the events of the time. Unfortunately we are left with no alternative but to accept the decision," said Schade.


Edmond Tapsoba has signed an early extension to his contract with Bayer 04 Leverkusen. With two years left on his current deal, the 27-year-old Burkina Faso international has extended his contract until 30 June 2031. The centre-back joined as a young talent from Portuguese top-flight club Vitoria Guimaraes at the start of 2020.
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A special surprise: during the preview for the 'Fierté Burkinabè' documentary about Edmond Tapsoba, Bayer 04 directors Fernando Carro and Simon Rolfes announced Tapsoba's contract extension until 2031 together with the centre-back. He then spoke to Werkself-TV about his time in Leverkusen so far and future ambitions...
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This evening was deeply moving: At a really special setting, Bayer 04 exclusively presented the specially produced documentary ‘Fierté Burkinabè’ ("Burkinabe Pride") about Edmond Tapsoba on Tuesday. For the preview at the BayArena, the parents of the Werkself player and other close companions travelled all the way from his African homeland Burkina Faso. The 45-minute film shows Tapsoba's extraordinary career from his beginnings in Ouagadougou to Leverkusen as well as the work of his foundation "Fondation Edmond Tapsoba", with representatives from Burkina Faso also present. Fans can watch the documentary free of charge on Werkself TV and YouTube from Wednesday night at 20:00 CEST.
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Bayer 04 have signed left-back Carolin Simon from champions Bayern Munich for the coming season. The 33-year-old former Germany international, who played for Leverkusen from 2013 to 2016, has signed a contract to 30 June 2028.
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Bayer 04 Women have strengthened for the coming season with the signing of Lobke Loone. The 23-year-old Dutch striker joins from Utrecht on a contract until 30 June 2028.
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