Fiorentia captain, Davide Astori, died of a “cardiac arrest by natural causes”.
The 31-year-old was found dead at the La di Moret hotel in Udine , ahead of his side’s meeting with Udinese on Sunday.
The match and all Serie A fixtures on Sunday, were subsequently cancelled.
Astori was found on his bed by a club masseuse, before being taken to a local hospital for an autopsy.
“The idea we have of the situation is that the player died of cardiac arrest by natural causes.
“It is strange that such a thing should happen to a professional who is so closely monitored and showed no warning signs,” Udine prosecutor, Antonio De Nicolo, said.
Astori leaves behind his partner, Francesca Fioretti, and a two-year-old daughter, Vittoria. He had been due to sign a new contract with the Viola on Monday.