
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.

Four Bayer 04 players are in action at the 35th edition of the Africa Cup of Nations being played in Morocco from 21 December to 18 January 2026: Eliesse Ben Seghir for the hosts, Edmond Tapsoba with Burkina Faso, Ibrahim Maza for Algeria and Christian Kofane with Cameroon. Updates on the AFCON matches involving Werkself players...
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Two Saturdays, one Friday and one Sunday: The dates for the Bayer 04 Women's team games on matchdays 16 to 19 have been finalised. Three of the four matches scheduled by the German Football Association (DFB) on Tuesday will be played at home at the Ulrich Haberland Stadium.
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Bayer 04 currently have a number of promising young talents on loan to various clubs in Europe with the aim of gaining match practice and furthering their individual development. Francis Onyeka and Farid Alfa-Ruprecht, for example, play for VfL Bochum 1848, while Artem Stepanov is a striker with 1. FC Nürnberg, coached by World Cup winner Miroslav Klose. Tim Oermann is a defender in the Austrian Bundesliga at top club SK Sturm Graz and Abdoulaye Faye is playing in France for FC Lorient, promoted to Ligue 1 this season. Bayer04.de reviews the first six months for the Leverkusen players out on loan.
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Despite a courageous display, the Bayer 04 Women missed out on a surprise at the start of the second half of the Bundesliga season. Coach Roberto Pätzold's team lost 3-0 to league leaders Bayern Munich on Monday night. An early goal from the clinical visitors, a disputed penalty and another spot-kick prevented Leverkusen, who are seventh in the table on 22 points from 14 games, from picking up a point in front of 3,011 spectators at the sold-out Ulrich Haberland Stadium.
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