Real Madrid attacker Vinicius Junior is taking legal action against Nike in order to break his £7m-a-year contract.
Globo says Vinicius, 22, who has been one of the shining lights for his country at the World Cup in Qatar, feels unfairly treated by the company.
Vinicius has told his lawyers to attempt to get him out of his deal with the sportswear giant.
As it stands, he is still under contract and continues to wear Nike boots at the World Cup, where he scored the opener in his side's 4-1 win over South Korea on Monday evening.
Vinicius Jr's deal with the sportswear manufacturer runs until 2028 and the lawsuit was filed just before the World Cup.
He wore an old version of Nike Mercurial boots during Real Madrid's run to the Champions League title last season and the rapid attacker thinks Nike should give him more recognition as one of their biggest stars.
He is also said to have not attended a number of Nike company events.