LaLiga president Javier Tebas has accused Paris Saint-Germain and Manchester City of "cheating" and called for the Ligue 1 giants to be banned from the Champions League.
PSG and City both found their financial practices under the microscope earlier this month following a series of articles by Der Spiegel and MediaPart, drawing on documents purportedly obtained by whistleblowers Football Leaks that claimed each club had broken rules by attempting to circumvent UEFA's Financial Fair Play (FFP) laws.
Premier League champions City declined to comment on the allegations, adding that "the attempt to damage the club's reputation is organised and clear".
PSG maintained that they have "always acted in absolute compliance with the laws and regulations issued by sports institutions".
Both clubs have not responded to a request from Omnisport for further comment with regards to the latest observations from Tebas, who dismissed their protestations and urged UEFA to take action.
"I said two years ago that PSG and Manchester City were cheating so it wasn't a surprise to me at all," he told Goal at Soccerex in Miami.
"It's very important that UEFA does something real about it. It's something that has unbalanced world football and the structure of the game. You have to punish those teams."
Tebas feels a season-long ban from the Champions League for PSG would be a welcome show of strength from UEFA.
"Forcing them to sit out a year of the Champions League would send a message that these rules must be taken seriously," he said.
"It isn't about punishing PSG specifically, but enforcing rules we expect everyone to follow."
City and PSG reached settlements with the UEFA Club Financial Control Body in May 2014 after they breached FFP regulations.
Along with €60million fines and spending caps for the 2014-15 season, the clubs could only name 21 players in their Champions League squads that campaign. City had two thirds of their fine refunded in April 2017.
One of the Der Spiegel revelations was that then-UEFA general secretary Gianni Infantino worked with the clubs to agree favourable terms.
Infantino is now president of FIFA and has defended his conduct at the time.
"Our goal at UEFA was always to keep the clubs with us, not to kick them out, so you negotiate and seek solutions. That was my job as general secretary," he told Swiss publication Blick.
"The fact is, in the history of FFP, 30 violations have been detected. With all but one club there were agreements - agreements and negotiations are expressly allowed."
Speaking two weeks ago amid Der Spiegel's series of articles, City manager Pep Guardiola told reporters he expected his club to be punished if they were found to have violated UEFA rules.
"I trust a lot the club and I know the people [on the City board]," he said. "If there's something wrong, we'll be punished. FIFA or UEFA have to say if we were wrong. If we were wrong, we accept it."
|Canelo outclasses Fielding by third-round TKO|
|Farmer retains title prior to Canelo-Fielding bout|
|Qatar unveils Lusail Stadium for 2022 World Cup|
|Lakers pair LeBron, Ball revel in triple-double feat|
|Allegri hails ´great professional´ Ronaldo|
|LeBron, Ball first Lakers team-mates with triple-doubles in same game since 1982|
|Premier League contenders Liverpool ready to win titles – Henderson|
|Hopkins´ two TDs help Texans close in on AFC South title with win over Jets|
|Courtois: Simeone criticises Real Madrid to boost popularity|
|Mourinho in the dark over transfers as Pogba rumours swirl again|
|Mourinho marvels at Salah going nuclear|
|The lucky ones - Mourinho assesses Liverpool´s title charge|
|Juventus boss Allegri turned his back on Ronaldo penalty|
|Dickerson hoping Barkley falls short of breaking his records|
|Bristol shock La Rochelle, Clermont win again|
|LeBron: Meeting Jordan for first time was godly|
|Ronaldo scores Juventus´ 5,000th Serie A goal|
|I was all over the place - Allen reaches Scottish Open final despite hangovers|
|Solari defends wasteful Asensio after slim Madrid win|
|Torino 0 Juventus 1: Ronaldo capitalises on Zaza woe|
|I do my work on the pitch – Icardi unconcerned by Inter contract discussions|
|Lyon defender Rafael set for three months out|
|Inter captain Icardi is the ´perfect´ striker – Spalletti|
|Fulham have to stick together, says Ranieri|
|Nuno hails ´very special´ Wolves achievement after third straight win|
|Stuttgart captain Gentner´s father dies at Hertha fixture|
|Valverde not desperate for new centre-back amid talk of Christensen loan|
|Toulouse and Saracens stay perfect in Champions Cup|
|Kovac lauds Bayern´s best performance of the season|
|Barcelona can get the best out of Coutinho and Dembele, claims Valverde|
|Borussia Dortmund 2 Werder Bremen 1: Alcacer and Reus guarantee top spot for mid-season break|
|Bristol City 2 Norwich City 2: Canaries knocked off their perch despite late equaliser|
|Atletico´s fighting spirit lauded by Simeone, Godin|
|Hodgson relieved to see Palace end Zaha curse|
|Real Madrid 1 Rayo Vallecano 0: Benzema secures steady response to CSKA loss|
|Fulham 0 West Ham 2: Snodgrass, Antonio punish profligate hosts|
|Warnock brands refereeing situation ´a disgrace´ after Watford defeat|
|Inter 1 Udinese 0: Icardi penalty gets lethargic Nerazzurri back on track|
|Wagner retains belief in survival bid despite Newcastle defeat|
|Griezmann feeling the strain after busy 2018|
|Pochettino ´so pleased´ as tired Tottenham scrap to Burnley win|
|Man Utd hand Smalling new contract|
|ES Tunis 0 Al Ain 3: Convincing victory books River Plate semi|
|Championship Review: Bamford fires Leeds to summit, Middlesbrough defeated by QPR|
|Curry reacts to Kings´ trolling with moon landing video|
|Wentz ruled out of Rams clash|
|Pochettino reaches 100 Premier League wins for Tottenham faster than Wenger for Arsenal|
|Real Valladolid 2 Atletico Madrid 3: Griezmann the hero on landmark appearance|
|Silva rues Richarlison´s missed chances at City|
|Gibson has no worries over Proteas batsmen|
|Wolves 2 Bournemouth 0: Jimenez and Cavaleiro score against toothless Cherries|
|Crystal Palace 1 Leicester City 0: Captain Milivojevic earns vital victory|
|Watford 3 Cardiff City 2: Hornets hang on despite late fightback|
|Tottenham 1 Burnley 0: Eriksen snatches victory at the death|
|Huddersfield Town 0 Newcastle United 1: Rondon strike settles scrap|
|Sabres suspend forward Berglund for failing to report to the team|
|Saunders thanks Fury for getting him ´back on the right track´|
|Hannover 0 Bayern Munich 4: Gnabry and Kimmich star in crushing win|
|I admire Sterling – Guardiola|
|City´s strength in depth makes it hard for me – Jesus|
|Jamieson holds slender lead in Malelane|
|Kashima Antlers 3 Guadalajara 2: Comeback win sets up Real Madrid semi-final|
|Hosszu claims fourth Hangzhou gold, Le Clos beaten by Santos|
|Manchester City 3 Everton 1: Jesus at the double as City go top|
|Parker defiant on low blow claims after ending 2018 ´with a bang´|
|Alisson: Liverpool must beat Manchester United|
|Mourinho´s brutal honesty praised by Karanka|
|Fielding inspired by Bellew after overcoming setbacks to face Canelo|
|Mourinho loves being a manager ´more than ever´|
|Khawaja unconcerned by poor start to India series|