
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.


Bayer 04 will have to manage without forward Moussa Diaby for their upcoming matches. The 27-year-old Frenchman sustained a thigh injury in the 3-0 defeat against TSG Hoffenheim yesterday afternoon, Sunday 25 October. Diaby is expected to be available again after the international break in November.
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It has been a long time since feeling what it’s like to come away empty-handed. The last – and so far only – defeat of the season, in Elversberg, was two months ago. Since then, Bayer 04 have followed that up with seven wins and a draw. Now it has happened again away to TSG Hoffenheim. As the match progressed, the Werkself grew in confidence and “could even have scored the opening goal”, as Robert Andrich said after the game. In the end, it was the side from Sinsheim who sealed a 3–0 victory after “hectic closing stages” (kicker). The Werkself review.
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Werkself-TV shows the highlights of Bayer 04 Women's 0-2 loss at 1. FC Nürnberg on Matchday 8 of the 2026/27 Google Pixel Women's Bundesliga.
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Werkself TV shows the highlights of Bayer 04's 0-3 loss at TSG Hoffenheim on Matchday 7 of the 2026/27 Bundesliga season...
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