Zlatan Ibrahimovic's supposed part-ownership of a betting firm has prompted a disciplinary inquiry by UEFA.
The governing body of European football has named an ethics and disciplinary investigator to determine if Ibrahimovic has broken any of the league's betting rules.
A UEFA statement read: "In accordance with Article 31(4) of the UEFA Disciplinary Regulations (DR), a UEFA Ethics and Disciplinary Inspector has today been appointed to conduct a disciplinary investigation regarding a potential violation of the UEFA Disciplinary Regulations by Mr. Zlatan Ibrahimovic for having an alleged financial interest in a betting company.
"Further information regarding this matter will be made available in due course."
Players with financial interests in gambling firms are not permitted to compete in any of UEFA's or FIFA's competitions.
Ibrahimovic maintains his financial interest in Bethard after becoming a part-owner in 2018, according to Swedish newspaper Aftonbladet.
According to FIFA rules, the former Manchester United forward could face a three-year suspension from football and a fine of up to £86,000. The potential sanctions imposed by UEFA are less evident.
According to Aftonbladet, Ibrahimovic broke FIFA rules by coming out of retirement to play for Sweden in World Cup qualifiers against Georgia and Kosovo in March.
In September of last year, he is also accused of breaking UEFA rules while playing for AC Milan in a Europa League match against Shamrock Rovers.
Last week, Ibrahimovic signed a new one-year deal with AC Milan, extending his stay at the club past his 40th birthday.
He has scored 17 goals in 27 appearances for the Serie A giants in all competitions this season, having previously played for Ajax, Juventus, Inter Milan, Barcelona, Paris St Germain, Manchester United, and LA Galaxy.