UEFA have been urged to scrap plans which will allow European heavyweights entry to the Champions League despite a poor campaign.
A revamp of the competition was rubber stamped in the wake of the European Super League debacle but has sparked criticism from the 37 European Leagues.
The Scottish Premiership, the English Premier League, La Liga, the Bundesliga, Serie A and Ligue 1 are among the top divisions to rally against a key part of the proposal.
The shake-up, starting in 2024, will see 36 clubs playing in one single league to replace the traditional group stage format.
Within the league, each side will play 10 matches against 10 different opponents.
The top eight sides after those 10 games will qualify directly for the last 16 while teams in ninth to 24th place go into play-offs to compete for the other eight spots.
Controversially, the proposals will also see two clubs granted spots in the new-look Champions League based on historic performance.
This would take the place of the conventional coefficient point route which has been strengthened in recent years by Scottish Premiership sides.
Recent exploits in the Europa League and Champions League by both Rangers and Celtic have seen this season's champions all-but guaranteed group stage football.
Scotland finished last season in 11th place in the rankings, meaning that early challengers Hearts, along with defending champions Rangers and hopefuls Celtic could be rubbing shoulders with the European elite.
However, the historic performance places look likely, at some point, to function as a get out of jail free card for a Champions League regular who just happens to have a poor domestic season.
European Leagues members have called for the trap door to be scrapped amid fears over clubs leapfrogging sides above them in the domestic league table as a result.
It said in a statement on Friday following its General Assembly in Milan: "Sporting merits (from the latest season) are the deciding factor in winning or losing matches and competitions, and thus in participating (or not) in domestic and international competitions. Earn it on the pitch.
"The co-efficient as a tool for qualification or distribution (of revenue) for a future UEFA club competition must be completely dismissed."
European Leagues managing director Jacco Swart told reporters UEFA had promised a "second stage in the process" next spring where he hoped the topics his organisation had issues with would be addressed.
