[1] He first took up rudimentary bridge during World War II when more than thirty years old.
[2] Along with interests in tennis, riding and motor racing, he was especially noted for "his addiction to gastronomy".
[2] Avarelli was the longtime partner of Giorgio Belladonna using the Roman Club bidding system.
They improved the system together and presented it in a book that was published in at least two Italian editions, 1958 and 1969.
Avarelli won 12 world championships, all as one of six players on the Italy open team-of-four.