“There will never be anyone like you, unique, special, after you the absolute nothing….,” Cappelletti also wrote on Facebook.
But Italy’s sporting icon almost missed out on the tournament.
He was caught up in a bribery scandal, and banned for three years in 1980, but after continually protesting his innocence was cleared to play.
A slight and sprightly winger who converted to centre-forward, Rossi had an uncanny ability to be in the right place at the right time.
He exploded onto the stage of the 1982 tournament with a hat-trick in the 3-2 defeat of Brazil.
Rossi finished top scorer in the tournament with six goals.
He was also a member of the Italy side that finished fourth in Argentina in 1978.
Along with Christian Vieri and Roberto Baggio, he holds the Italian record for nine goals scored in the World Cup.
He scored 20 goals in 48 appearances for Italy and was voted European Footballer of the Year in 1982.
Born in Prato in Tuscany, Rossi made his professional debut at Juventus in 1973, and also played for Vicenza, Perugia and AC Milan before finishing his career in 1987 in Verona.
After his career as a footballer, Rossi worked as a TV pundit.
He is survived by his wife and three children.