
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 ended the year with a 3-1 win away at RB Leipzig and will go into 2026 in third place in the Bundesliga table, leapfrogging their opponents, who had previously not dropped a point at the Red Bull Arena this season. Martin Terrier and Patrik Schick scored to turn around a first-half deficit before Montrell Culbreath rounded things off with a goal on his senior debut deep into added time. Ezequiel Fernández, Axel Tape and Lucas Vázquez also all returned from injury.
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Bayer 04 are away at RB Leipzig for their final fixture of 2025 in the Bundesliga on Saturday (kick-off: 18:30 CET). Here’s all you need to know ahead of the Matchday 15 encounter at the Red Bull Arena.
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Despite a major personnel shake-up in the summer, RB Leipzig have performed impressively this term. Ahead of matchday 15, coach Ole Werner's team are second in the Bundesliga with a three-point lead over their upcoming opponents Bayer 04. This Saturday, 20 December (kick-off: 18:30 CET), the Werkself are away to RBL who are strong at home. The lowdown on our next opponents.
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Bayer 04's final game of the year at RB Leipzig on Saturday night, 20 December (kick-off: 18:30 CET), will also see Robert Andrich and David Raum go head-to-head. In an interview with bayer04.de and rbleipzig.com, the two team captains spoke about the importance of this match, their friendship and a WhatsApp group with Joshua Kimmich.
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