A group of European super clubs are reportedly set to announce the creation of a Super League on Sunday night, the day before proposed Champions League reform is due to be ratified.

There has been talk for years of a closed shop league featuring the world's biggest teams, separate from the current UEFA structure.

That has long been the dream of Real Madrid president Florentino Perez, and outgoing Barcelona chief Josep Bartomeu announced before his departure that he had signed the Catalan giants up.

Reform of the Champions League has been pushed by Juventus president Andrea Agnelli, who is also head of the European Club Association.

He has insisted he does not want to see a closed shop, but he does want 'protection' for clubs based on their previous records in Europe.

Real president Florentino Perez

It appeared that a solution had been found with an expanded Champions League, but L'Équipe journalist Bertrand Latour reports that UEFA are in a crisis meeting with a breakaway league set to be announced on Sunday evening.

He states that "five or six" English clubs as well as three each from Spain and Italy will announce the move tonight.

No French and German clubs are said to be on board, but it's sparked crisis talks within UEFA.

The new Champions League format is due to be ratified at the organisation's executive committee meeting on Monday.

The traditional group stage will be thrown out and replaced with a league format based on a so-called ‘Swiss system’ used in chess. The model is used for tournaments in which there are too many entrants to realistically all play each other, but no desire to shrink the tournament.

Under the scheme 36 teams qualify for the group stage of the competition, with two ‘wildcard’ places reserved for the non-qualified teams with the best coefficient record over the previous five seasons. For example, were Juventus and Liverpool to miss out this season they’d likely be granted a reprieve as one of the wildcard entrants.

After that, the coefficient is used to rank all the clubs from one to 36. Based on that, the teams are given five home games and five away games against 10 different opponents. After 10 games the top eight teams in the league go through to the last 16, while the next 16 teams go into a play-off round to determine who makes up the rest of the first knockout round.

The purported move by Europe's giants may be designed to win further concessions from UEFA, with disputes over distribution of revenues.

Under the plans on the table for Monday there would be no material change for Scottish clubs, but with the threat of a Super League Rangers and Celtic will be on high alert.

Agnelli has previously named Celtic and Ajax as clubs which should have easier access to the Champions League, as former European Cup winners, but in a closed shop breakaway it's unlikely teams from the Premiership could get a look-in.