UEFA are looking into closing a loophole in their Financial Fair Play legislation which allows teams to amortise transfer fees with long player contracts.
The current interpretation of the law allows teams to spread any transfer fees spent over the length of the player's contract, with Chelsea taking real advantage of that by signing their players to huge contracts this month.
Mykhailo Mudryk's eight-and-a-half-year contract is the longest in Premier League history and allows Chelsea to spread the FFP impact of their £80m spend over that length of time, making it significantly more manageable.