[2] He moved with his family to New York City's Lower East Side while still young, and began fencing there at the age of 12,[6] subsequently training under Michael Mokretsov[3] at the age of 13 at the New York Fencing Academy in Coney Island.

[9] Prior to his gold medal in the 2020 Tokyo Olympics, his highest ranking was 7th place at the Vancouver World Cup on 8 February 2019.

[10] Cannone, originally only scheduled as a replacement athlete, was the youngest member of the 2020 French team.

[12] On 25 July 2021, he defeated the Russian Sergey Bida in the quarter-finals (15–12) and the Ukrainian Ihor Reizlin (15–10) in the semi-finals,[13] and went on to win the gold medal (15–10) against the previous world champion Gergely Siklósi.

He became the first French Olympic champion in individual fencing since Brice Guyart won the gold medal in foil in 2004.