The apical European leagues and players' national Fifpro person filed a ineligible ailment against Fifa with the European Commission implicit what they assertion is an "abuse of dominance" by satellite football's governing body.
The European Leagues, which represents 39 leagues - including the Premier League - and 1,130 clubs crossed 33 countries, claim, on with the European subdivision of Fifpro, that Fifa has abused its relation nether European contention instrumentality erstwhile it comes to the planetary fixture calendar.
The Spanish La Liga is not a subordinate of the European Leagues but is joining the action.
Alexander Bielefeld, manager of argumentation astatine Fifpro, said the antithetic parties "had submitted a ineligible ailment to the European Commission" and called it "unprecedented".
BBC Sport looks astatine the lawsuit from some sides and the arguments being made.
How did we get to this?
There has been an ongoing enactment astir the fig of games players look during a play and this is the latest ineligible enactment that has been filed connected the issue.
The Professional Footballers' Association joined a ineligible enactment against Fifa successful June astir the "overloaded and unworkable" shot calendar.
The PFA and the French players' national filed a assertion astatine the Brussels tribunal of commerce "challenging the legality of Fifa's decisions to unilaterally acceptable the planetary lucifer calendar and, successful particular, the determination to make and docket the Fifa Club World Cup 2025".
There are scheduled to beryllium 12 European representatives astatine the expanded Club World Cup, to beryllium held successful the United States from 15 June-13 July.
The tourney was confirmed by the Fifa Council successful December 2022 and the PFA argues it is simply a "tipping constituent for the shot calendar and the quality of players to beryllium capable to instrumentality meaningful breaks betwixt seasons".
Fifpro has besides claimed, external "Fifa's decisions implicit the past years person repeatedly favoured its ain competitions and commercialized interests, neglected its responsibilities arsenic a governing body, and harmed the economical interests of nationalist leagues and the payment of players".
This season, each 3 European nine competitions person been expanded to 36 teams. The Champions League and Europa League person 8 first-phase games, compared to six successful the 2023-24 campaign.
The PFA highlighted that for immoderate of its members "the 2024-25 play is acceptable to rotation astir seamlessly into the 2025-26 season".
The Premier League run finishes connected 25 May, earlier the Champions League last connected 31 May.
There volition past beryllium a model of planetary games from 2-10 June earlier the commencement of the extended Club World Cup.
Manchester City wanted a hold to their matches astatine the commencement of the 2025-26 play due to the fact that of their engagement successful the Club World Cup, but bash not deliberation the Premier League volition hold to specified a request.
The adjacent World Cup past takes spot successful the summertime of 2026, with Canada, Mexico and the United States being the co-hosts.
What bash the players say?
Spain and Manchester City midfielder Rodri precocious said players are adjacent to going connected onslaught successful protestation astatine an summation successful games.
The 28-year-old featured 63 times for nine and state past play arsenic helium won the Premier League and European Championship.
According to a caller Fifpro study connected subordinate workload, Rodri was included successful 72 matchday squads for nine and country, including pre-season friendlies, betwixt July 2023 and July 2024 - totalling 6,107 minutes connected the pitch.
Rodri played much than 550 minutes for Spain astatine Euro 2024, featuring successful each of the 7 games until coming disconnected injured astatine half-time successful the last connected 14 July.
He returned to enactment connected 8 September for his state successful a Nations League crippled against Switzerland earlier suffering a season-ending genu wounded playing for City against Arsenal connected 22 September.
Switzerland and Manchester City defender Manuel Akanji has joked helium whitethorn person to discontinue astatine 30 due to the fact that of relentless fixture schedules, portion Liverpool keeper Alisson has besides complained implicit a perceived deficiency of consultation astir the shot calendar.
"Sometimes cipher asks the players what they deliberation astir adding much games," said Alisson, who is presently sidelined with a hamstring injury.
"Maybe our sentiment doesn't matter, but everybody knows what we deliberation astir having much games. Everybody's bushed of that."
What bash Fifa and Uefa say?
One of the claims levelled astatine Fifa is that it did not person a due consultation process earlier expanding the shot calendar.
World football's governing assemblage has insisted Fifpro and the World League Association were consulted astir changes to the wide 2025-30 planetary lucifer calendar, including the 2025 Club World Cup.
Fifa says, external it has nary volition of altering adjacent year's Club World Cup, saying it is "fully wrong our rights to acceptable the parameters of our competitions whilst respecting the regulatory model successful place".
Fifa has besides accused immoderate leagues of "hypocrisy" and acting "without information to everyone other successful the world".
"Those leagues seemingly similar a calendar filled with friendlies and summertime tours, often involving extended planetary travel," said Fifa.
"By contrast, Fifa indispensable support the wide interests of satellite football, including the extortion of players, everyplace and astatine each levels of the game."
Following the extremity of the past Premier League run connected 19 May, Newcastle United and Tottenham flew to Australia for an end-of-season friendly astatine the Melbourne Cricket Ground.
Premier League clubs besides took portion successful pre-season games crossed the US and successful Tokyo past summer.
A caller survey by the CIES Football Observatory,, external - a probe radical astatine the International Centre for Sports Studies - connected schedules and subordinate workload suggested that clubs are not playing much matches per season.
Its study recovered that betwixt 2012 and 2024, the mean fig of fixtures per nine and play sat astatine conscionable implicit 40, with astir 5% of clubs playing 60 oregon much games per season.
No important alteration was observed successful the proportionality of clubs playing 60 oregon much matches.
Uefa president Aleksander Ceferin has conceded "the lucifer calendar has reached afloat capacity" but besides believes complaints implicit the contented are from a number of players.
"The interaction is precise antithetic among clubs and players. Some are over-burdened. The others person spare capacity," helium said.
"In fairness to those who are stretched, I basal by what I said 2 months ago, determination is nary country for further matches. But I person to adhd this, who is complaining? The ones who person the highest salaries and the ones [clubs] with 25 apical players.
"The ones with little salaries and hardly 11 players are not complaining. They emotion to play."