The Premier League will investigate Everton's accounts after it announced a company part-owned by Alisher Usmanov paid £30m to secure an option on the naming rights of their new stadium, Sky Sports News can confirm.

The Daily Mail reports the league will look into the unprecedented deal as part of its review into all clubs' financial reports in the spring.

Premier League rule E.54 states: "The board shall determine whether consideration included in the club's earnings before tax arising from a related party transaction is recorded in the club's annual accounts at a fair market value.

"If it is not, the board shall restate it to fair market value."

Everton are understood to be comfortable with the deal and have made the Premier League fully aware of the details.