The Italian press on Sunday paid tribute to Morosini.
Turin-based Tuttosport's headline read, "We have lost a son", while La Repubblica's editorial was headlined, "Incredulous and helpless".
The Gazzetta dello Sport focused on the controversy over the medical assistance.
An inquiry has been launched into why a traffic police car had to be broken into and removed as it was blocking the ambulance's entrance.
The Corriere dello Sport focused on the tragic elements of Morosini's life, which left him alone with his disabled elder sister. "A life marked by pain," was its headline.
Morosini was an Italy under-21 international and played for a number of clubs, including Atalanta, Reggina, Padova, Bologna and Vicenza.
"He was golden, always trying to help his family," Atalanta youth team director Mino Favini told Associated Press.
Fifa president Sepp Blatter tweeted: "Only tears. There are no words to express what I tried to when I found out about Piermario Morosini's death."
The tragedy follows a similar incident involving Bolton's Fabrice Muamba last month.
He was technically "dead" for 78 minutes after collapsing in an FA Cup tie against Tottenham but is now making "strong and steady improvements".
Following Muamba's collapse, attention had been drawn to the situation for athletes in Italy, which has mandatory cardiac screening for all young people engaged in organised sport.
The charity Cardiac Risk in the Young says that the Italian measures have reduced the incidence of young sudden cardiac death in Italy by 90% in the 30 years since the screening was introduced.
http://www.bbc.co.uk/Football star: Piermario Morosini, right, battles for the ball during an Italian league match
last month. He died last night after collapsing on the pitch.
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