Italy coach Antonio Conte is among 130 people who have been formally notified they are under investigation for match-fixing.
Conte is being investigated for committing sports fraud when he coached Siena in 2010-11, although a charge of criminal association was dropped.
Atalanta coach Stefano Colantuono has also been notified he is under investigation by Cremona prosecutor Roberto Di Martino in a step that usually precedes indictments.
Conte is accused of involvement in fixing matches at the end of the season when Siena had already clinched promotion to Serie A and other clubs were still fighting to qualify for a playoff.
Conte, who has denied wrongdoing, already served a four-month sports ban in the case.
More than 50 people have been arrested in Italy for match-fixing since mid-2011.