O REI Sport Law Publications
A working archive of student writing in international sports law.
Selected student articles and master's theses produced inside O REI. A working record of how the next generation of sports lawyers is thinking about the legal questions shaping the industry.
Articles published by O REI faculty, students, and alumni in external journals and outlets.
External Publications
2 entries · #employment contracts
2024-2025 edition
2 entries
Administrative Obligations in Football: Legal Implications of Visa, Work Permit and Registration Failures
This article analyses the legal consequences of a club’s failure to comply with key administrative obligations in international football transfers, particularly obtaining visas, work permits and completing player registration. Drawing on FIFA regulations and CAS jurisprudence, it explains that clubs, as employers, are generally responsible for ensuring that players are legally able to work and compete. The article also addresses how serious failures in this process may give players grounds to terminate their employment contracts with just cause.
Alberto Ruiz de Aguiar Díaz-Obregón & Alexander Kirov
LLM 2024-2025 O REI Sports Law Graduate
12 June 2026
The Impact of Social Media on Players – Does the Freedom of Speech Exist?
This article analyses the tension between players’ freedom of expression and the regulatory, contractual and reputational limits imposed by clubs, leagues and governing bodies. It explores how social media has amplified athletes’ public voice, while also increasing the risk of disciplinary consequences, reputational harm and contractual disputes. The article highlights the need to balance individual rights with professional obligations, team interests and the broader integrity of sport.
Alberto Ruiz de Aguiar Díaz-Obregón & Josué Arroyo
LLM 2024-2025 O REI Sports Law Graduate
12 June 2026
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Submissions are welcomed from current O REI students, alumni, and visiting researchers. Include your full name, programme, and a brief statement of credentials.
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