Switzerland has reportedly dropped the midfielder from its squad amid an investigation into whether he obtained fraudulent documentation to appear vaccinated.
The allegations form part of a wider inquiry into a Swiss doctor accused of producing counterfeit certificates for people who had not received a Covid-19 vaccine.
Authorities have not established that Xhaka committed a crime, and no final legal findings have been announced.
The case has placed renewed attention on the strict health regulations that shaped international football during the coronavirus pandemic, when vaccination records were required for travel and participation in some competitions.
Xhaka, a long-serving Switzerland international and former captain, has not publicly confirmed the allegations. Any decision about his return to the national team is expected to depend on the outcome of the investigation and the Swiss football authorities’ assessment.
The inquiry remains ongoing, and further details are expected as investigators examine the doctor’s alleged activities and the authenticity of certificates linked to the case.