Serie A Champions Juventus, Lazio, Fiorentina and AC Milan face possible relegation if found guilty by a FIGC tribunal which will convene next week, local media reported.

FIGC said Palazzi "had notified 30 subjects" that they will be charged with sporting fraud and violations of fairness and probity, according to articles 1 and 6 of the FIGC's sporting regulations.

Teams guilty of sporting fraud can be relegated, stripped of their titles, and have points deducted next season as well as face fines.

Individuals found guilty of misconduct face the prospect of being banned from working in the game.

FIGC's brief statement did not name the individuals charged but nine referees, former FIGC Chief Franco Carraro and Lazio Chairman Claudio Lotito were among those suspected of being implicated, as well as former Juventus general manager Luciano Moggi, the alleged ringleader.

The announcement came an hour after Italy's national team reached the second round of the World Cup by beating the Czech Republic 2-0 and after the Italian bourse closed for the day.

Juventus, which clinched its 29th Italian title last month, is expected to face the stiffest charges in the trial, due to start on June 27.

The Turin giants could be relegated to the third division and lose their two most recent Italian titles, while the other three clubs are likely to be relegated to the second division–although Milan is said to be more heavily implicated.

All four clubs would therefore be eliminated from European competition next year, the reports said.