Inter have confirmed they will take legal action against Javier Tebas, the president of LaLiga.
In an interview with ABC, Tebas criticised Inter over the club's pursuit of Real Madrid midfielder Luka Modric.
Madrid have made a complaint to FIFA accusing Inter of making an illegal approach for the Croatia star and Tebas subsequently weighed into the row.
The LaLiga chief suggested Inter had offered Modric "an awful lot of money" despite having "no money", allegations that have angered the Nerazzuri.
"Inter announces that it will take legal action against Mr Javier Tebas in the face of statements made today in the press," read the club's statement.
Lega Serie A also hit out at Tebas over the comments he made to ABC.
"The Lega Serie A is surprised and upset by the declarations of LaLiga president Javier Tebas," said the league's statement.
"These comments were made without having any knowledge, yet damage the reputation and put into doubt the integrity of two Italian clubs and the league.
"Lega Serie A cannot passively accept comments that use the media to destabilise us on the international stage.
"Serie A clubs operate within the parameters set by all international rules, which is why Lega Serie A is going through a period of great optimism and enthusiasm, shared by media and fans all over the world, who grew exponentially in recent seasons.
"At the start of a season that will bring four Serie A clubs back into the Champions League group phase, we are certain that the rediscovered spirit and prestige of Serie A should not frighten opponents, but rather motivate the European panorama towards new heights of competitiveness and entertainment."
|Valverde surprised by Coutinho controversy|
|Sexton, Mako Vunipola return for European Champions Cup|
|Under-strength Hurricanes survive Sunwolves scare|
|Lingard admits top-four finish would be ´massive´ for Manchester United|
|Icardi planning Inter stay - agent Wanda Nara|
|Impossible to recreate Ajax model in Serie A – Spalletti|
|Elijah Holyfield set for NFL armed with fatherly advice and Georgia grounding|
|Guardiola ´delighted´ for Ajax boss Ten Hag|
|He can be an important player for us - Gattuso leaves door open for Silva|
|Medvedev stuns Djokovic to continue dream Monte Carlo run|
|Guardiola: Referees can still make mistakes with VAR|
|Te´o to depart Worcester Warriors amid rumours of Top 14 move|
|Odriozola suffers broken collarbone|
|Sheffield United 2 Nottingham Forest 0: Duffy sends Blades second|
|I really felt for them – Klopp sympathises with Manchester City´s VAR heartbreak|
|Champions League exit no title race advantage for Man City, says Guardiola|
|Mitchell magic seals golden-point win for Roosters|
|Kante: Chelsea not favourites for Europa League|
|Adelaide United 1 Melbourne Victory 0: Blackwood header snatches victory|
|Klopp applauds ´role model´ Salah after making Time magazine cover|
|Fabregas suffers calf injury ahead of PSG clash|
|Ronaldo is the future of Juventus - Allegri defends star after Champions League exit|
|Simeone: Costa issue is resolved|
|Khan always believed big nights would return as Crawford looms into view|
|Liverpool and Manchester City are miles ahead of the rest - Warnock|
|Wilder: Joshua fight is inevitable|
|There´s no other player like him - Rivaldo tips Messi for Ballon d´Or|
|Malone urges Nuggets response to ´hungry´ White|
|Fosu-Mensah returns to Man United from Fulham for knee surgery|
|Solskjaer claims some Manchester United stars ´need a reality check´|
|Brown lauds exceptional Simmons after Sixers take series lead|
|Maitland-Niles buoyed by Emery´s belief in Arsenal stars|
|Durant showed who he is – Kerr|
|Giroud will stay at Chelsea, insists Sarri|
|The big Friday Premier League quiz|
|Dodgers hold off Brewers|
|76ers win without Embiid, Warriors bounce back in big way|
|Knicks confident they will appeal to stars|
|Capitals´ Reirden heated after hit on ´defenseless´ Oshie|
|Brady, Edelman react to Gronkowski denting the Lombardi Trophy|
|Koulibaly not drawn on future after Napoli loss|
|Ancelotti backs Napoli squad despite Europa League disappointment|
|Ajax in Champions League semis is ´crazy´, says Vertonghen|
|Pochettino reflects on ´bad feelings´ during dramatic win|
|Embiid to miss 76ers´ game three against Nets|
|Lowry leads RBC Heritage, Johnson makes good start|
|Benfica boss Lage bemused by touchline dismissal|
|Arsenal favourites for Europa League - Marcelino|
|Milner hoping for third time lucky at Barcelona|
|This Week in US Sports: Lightning handed historic loss, Red Sox massively hungover|
|Emery expects Ramsey to be out for ´some weeks´|
|NFL Draft 2019: Should Cardinals take Murray or stick with Rosen?|
|It´s a big problem – Sarri baffled by Chelsea´s second-half woes|
|Hazard knock ´nothing serious´, hopes Sarri|
|Drop in intensity caused Chelsea´s Europa League fright – Giroud|
|Focused Crawford welcomes Sugar Ray Leonard comparisons|
|Giants GM Dave Gettleman shuts down Josh Rosen trade talk|
|Cas hold off Wakefield to win thrilling derby|
|Arsenal saw off Napoli with spirit - Koscielny|
|Napoli 0 Arsenal 1 (0-3 agg): Lacazette stunner sees Gunners coast through|
|Eintracht Frankfurt 2 Benfica 0 (4-4 agg): Hutter´s men through on away goals after controversial Ko|
|Chelsea 4 Slavia Prague 3 (5-3 agg): Sarri´s men reach semis despite alarming second half|
|Valencia 2 Villarreal 0 (5-1 agg): Lato and Parejo set up Arsenal semi-final clash|
|Sharapova comeback delayed after Stuttgart withdrawal|
|Arsenal hit the front despite Ramsey blow|
|Liverpool to match Barcelona´s ticket prices and subsidise supporters|
|Manchester City lay on Wembley coaches for fans|
|Pandya brothers, Chahar and Bumrah star in comprehensive Mumbai win|
|Rose, Smalling and Deeney launch PFA anti-racism campaign #Enough|
|Hazard set for second Europa League start of season|