La Liga president Javier Tebas has accused Paris Saint-Germain and Manchester City of “financial doping”.
PSG shattered the world transfer record last month when they activated Neymar’s buy-out clause and paid £198m to buy the Brazilian from Barcelona, a payment which La Liga initially refused to accept.
The Ligue 1 club have also agreed a season-long loan for Kylian Mbappe that contains an obligation to buy the forward for £165m in 2018.
The mammoth spending spree has prompted UEFA to open an investigation into PSG’s transfer dealings with regards to Financial Fair Play (FFP) rules.
Tebas also took aim at Manchester City, who have spent vast sums to establish themselves as one of the premier sides in European football since being purchased by the Abu Dhabi United Group in 2008.
Speaking at the SoccerEx Convention in Manchester, Tebas said: “This is when football clubs have a competitive advantage due to income not coming from the clubs themselves.
“Recently, Manchester City and Paris Saint-German, before that Chelsea, have money that has not been created [by them] and have been able to get an advantage through this.
City, along with PSG, were the subject of a complaint made by La Liga in a letter to UEFA on August 22, calling for an investigation into both clubs for “violation of financial fair play regulations”.