Mikel Arteta received a personal apology from Arsenal owner Stan Kroenke after his role in the failed Super League plot as the Gunners boss saluted supporters for sending the "strongest message" football has ever seen.

Barcelona president Joan Laporta described the European Super League as a "necessity" on Thursday but said the final decision would be given to the club's members. 

Football's most powerful clubs are facing mounting calls for reprisals over the European Super League fiasco, although UEFA president Aleksander Ceferin said next week's Champions League semi-finals were unlikely to be affected.

The proposed European Super League can no longer exist without the six English clubs who have pulled out, the entourage of Juventus president Andrea Agnelli told AFP on Wednesday.

Leaders of the breakaway European Super League were searching for ways to rescue the ill-fated project on Wednesday after all six English clubs pulled out and Italy's Inter Milan were tipped to follow suit.

Britain's government vowed Monday to do "whatever it takes" to protect football, raising the possibility of invoking competition law to block a proposed new European Super League by breakaway clubs.

Manchester United, Liverpool, Arsenal, Chelsea, Manchester City, Tottenham, Barcelona, Real Madrid, Atletico Madrid, Juventus, AC Milan and Inter Milan on Monday announced plans for a breakaway European Super League.

Super League clubs Chelsea, Real Madrid and Manchester City should be kicked out of this season's Champions League, UEFA executive committee member and head of the Danish Football Association Jesper Moller told Danish broadcaster DR on Monday.

US investment bank JPMorgan on Monday confirmed it is financing the breakaway Super League featuring 12 of Europe's top football clubs, which threatens to shake-up the world's biggest sport.

Twelve of Europe's biggest clubs on Monday said they planned to launch a breakaway Super League, despite the threat of an international ban for them and their players.