Javier Tebas has reignited his feud with Manchester City as the head of La Liga accused Khaldoon Al-Mubarak of ignorance and rubbished insinuations he is racist.
Al-Mubarak, City's chairman, gave an interview to his club's website on Monday during which he accused their rivals of 'jealousy'; it came after Tebas had accused the Premier League champions of causing massive damage to European football with 'their petrol money'.
City were furious with the accusation and Al-Mubarak inferred there was a racially motivated agenda against gulf-owned football clubs, saying there was something 'deeply wrong about bringing ethnicity into the conversation'.
During a seminar in Madrid on Thursday ahead of the Champions League final, Tebas took part in an hour-long Q and A and he referred to City and Paris Saint-Germain as having taken part in 'financial doping' to get to the head of their respective leagues.
He was asked for a response to Al-Mubarak's comments and Tebas, 56, refused to back down.
'I did read the interview,' said Tebas. 'I think there is a lot of ignorance about certain things, firstly about how financial control works in European football and ignorance on regards to financial doping. I am not at all racist. I have no issues about ethnicity.
'How can I be racist if two of my grandchildren are Arab? I would be a racist against my own grandchildren! That just shows the ignorance and how easy it is to say things without knowing all the details and people's background. You are talking the ethnicity, it's not true.
'People get confused when I say they are opening up the petrol and gas and finance it like state clubs. It's not the first time I've spoken about it - we had (Roman) Abramovich at Chelsea - they had a lot of losses and he covered it by putting in more money, but he doesn't do it any more.
'Jealous? That is not true. Real or Barcelona have never been state clubs, they have never received support from the state. They are clubs which have not been financed like, for example, PSG when the CAS said they had inflated their sponsorship with Qatar.
'Manchester City are pending a sanction and that is also related to sponsorship. Real Madrid and Barcelona have never had a situation like that in their history; they have never been financed by the Spanish state. I recommend he goes and studies the rules and regulations more.'
Tebas is not a figure who will shy away from making big statements and he took aim at UEFA for their plans to restructure the Champions League from 2024. He claimed it is a move that is worrying the European game and accused UEFA of 'killing football'.
'I think phenomenon of the state clubs are attacking or controlling the institution itself,' said Tebas.
'UEFA should try to stop this financial doping. The big clubs want to change the competition so they can get more money so they are able to compete with this phenomena.
'At the moment it is a very dangerous change to a new competition In my opinion it is absolutely lethal for professional football in Europe, the big leagues and the small leagues. It will kill off all the domestic TV revenues for smaller clubs.'