Barcelona president Josep Maria Bartomeu has also spoken out against both clubs in what seems like a planned joint attack after PSG signed Neymar from the Catalan giants.
Speaking at SoccerEx, Tebas accused City and PSG and “laughing” at FFP and again questioned where the sponsorship money the clubs are getting is coming from.
Tebas said (translation via Football Espana): “UEFA and other institutions, such as the European Union, need to carry out an investigation.
“This is when the football clubs have a competitive advantage which does not coming from the club itself – it’s PSG and Manchester City now, it was Chelsea in the past.
“PSG having a lot more income from sponsorship than Manchester United is impossible – it is financial doping.
“If United had bought Neymar from Barcelona, then we would not be complaining as that would have been within the rules.
“There is incredible risk involved when money comes from states and governments.
“Manchester City paid nearly €1000m in transfers while PSG almost €950m…if we don’t control this situation then whole industry will become destructured.
“These clubs are laughing at the system – they have been caught peeing in the swimming pool; Neymar has peed from diving board. We can’t accept this.
“State aid for Barcelona and Real Madrid? That’s an argument my little kids would use. Why are you giving them biscuits and not me.”