The captain of Italy's Fiorentina football team has been found dead in a hotel room, according to Italian media.
The circumstances of 31-year-old Davide Astori's death are not known.
The player, who has a two-year-old daughter, was in Udine to prepare for Sunday's match against Udinese, which has been postponed according to reports.
The centre-back had been capped 14 times by Italy and had enjoyed a professional career spanning 12 years.
He started out at AC Milan, where he never played a Serie A match, before moving to Cagliari, the club where he made his big breakthrough.
He made 174 appearances for the Sardinians in a six-year spell, during which he made his national team debut.
In 2014, he was sent on loan to Roma and a year later made a similar transfer to Fiorentina.
In a statement published on its website, Fiorentina said: "Fiorentina are profoundly shaken and forced to announce that their captain Davide Astori has died.
"For this terrible and delicate situation, and above all out of respect for his family, we appeal to the sensitivity of the media."
La Fiorentina profondamente sconvolta si trova costretta a comunicare che e' scomparso il suo capitano Davide Astori, colto da improvviso malore.— ACF Fiorentina (@acffiorentina) March 4, 2018
Per la terribile e delicata situazione, e soprattutto per rispetto della sua famiglia si fa appello alla sensibilità di tutti. pic.twitter.com/bFGnkReWEC