The Premier League "needs to re-examine the assurances" it was given about potential Saudi state control of Newcastle United, says human rights group Amnesty International.
Newcastle's takeover by Saudi Arabia's Public Investment Fund (PIF) was approved after "legally binding assurances" the Saudi government would not have any control over the club.
However, in a US court case Newcastle chairman Yasir Al-Rumayyan has been described as "a sitting minister of the government" with "sovereign immunity".
The statements have been made by lawyers representing LIV Golf, owned by the PIF, which also has a controlling stake in Newcastle.