Livorno midfielder Piermario Morosini has died in hospital after suffering a cardiac arrest during his team's Serie B match at Pescara on Saturday afternoon.
The 25-year-old collapsed in the 31st minute and received treatment on the pitch - reportedly including a heart massage in a bid to resuscitate him - before being rushed to hospital.
All matches in Italy this weekend have been called off in memory of Morosini.
The Lega Serie A said in a statement on their website: "The football world mourns the tragedy that occurred this afternoon in Pescara, where during the game between the hosts and Livorno, the player Piermario Morosini slumped to the ground suffering from a heart attack.
"Transported to the hospital, the young midfielder was put into an induced coma, but died at around 1700.
"The FIGC has suspended, in memory of Piermario, all games scheduled over the weekend."