The case involves a contractual dispute between professional football player Mustafa Ozkan and Turkish football club MKE Ankaragucu Spor Kulubu, adjudicated by the Court of Arbitration for Sport (CAS). The conflict arose when Ozkan terminated his contract in December 2007, citing unpaid salaries as just cause under Turkish Football Federation (TFF) regulations. The TFF initially ruled in Ozkan's favor, awarding unpaid salaries and compensation, but both parties appealed to the TFF Arbitration Board, which upheld the termination while adjusting compensation amounts. Ozkan then appealed to CAS, seeking additional compensation, while Ankaragucu filed a counterclaim that was later deemed withdrawn due to non-payment of required advance costs under CAS rules. The CAS panel, composed of George Abela, Goetz Eilers, and Bernhard Welten, addressed jurisdictional issues and procedural matters, including the withdrawal of an arbitrator due to a conflict of interest. The case underscored the principle that a player may terminate a contract with just cause if substantial salaries remain unpaid, provided legal formalities are followed, absolving the player from liability for compensation. The proceedings highlighted the importance of adhering to procedural requirements, such as payment of advance costs for counterclaims, and reinforced CAS's role in resolving sports disputes. The substantive issues revolved around unpaid salaries, termination claims, and disciplinary fines. Ozkan argued he was owed YTL 258,500 in unpaid salaries, including a signing fee of YTL 130,000 that lacked documented proof of payment, while Ankaragucu countered with claims of overpayments and disciplinary fines. The panel found discrepancies in Ankaragucu's payment records and upheld Ozkan's termination as justified due to unpaid wages. Regarding damages, the panel awarded Ozkan YTL 150,000 for lost earnings during the 2007-2008 season, reinstating the original amount reduced by the TFF Arbitration Board. The final award, issued on December 20, 2012, ordered Ankaragucu to pay Ozkan a total of YTL 408,500, comprising unpaid salaries and damages, while dismissing all counterclaims. The case illustrates the complexities of contractual disputes in professional football, including financial claims, procedural challenges, and the enforcement of sports arbitration decisions.