Fiorentina captain and Italy international Davide Astori has died, the Serie A club have confirmed.
It is reported the 31-year-old was found in his hotel room on Sunday (AEDT), just hours before their league clash with Udinese.
"Fiorentina are profoundly upset to have to announce that captain Davide Astori has died," the club said in a statement.
"For this terrible and delicate situation, and above all out of respect for his family, we appeal to the sensitivity of the media."
Udinese tweeted to say the match will be postponed and Genoa's clash with Cagliari, which was due to kick off at 12:30 local time, has also been called off.
It is reported the remainder of Monday's (AEDT) Serie A matches will also not go ahead.
According to local reports in Udine, Astori passed away in his sleep at the La di Moret hotel, where Fiorentina were staying ahead of the match.
Astori, who turned 31 in January, joined the Viola in August 2015.
The Italy international had made 25 appearances in Serie A this season, most recently in last week's 1-0 win over Chievo.