In which kind of sport did two brothers Nedo Nadi and Aldo Nadi win 8 gold medals in the 1920 Olympic Games?

Aldo Nadi (29 April 1899 – 10 November 1965) was one of the greatest Italian fencers of all time.

Nedo Nadi (9 June 1894 – 29 January 1940) was one of the best Italian fencers of all time. He is the only fencer to win a gold medal in each of the three weapons at a single Olympic Games and won the most fencing gold medals ever at a single Games—five. Nadi won six Olympic gold medals in total.

Nedo Nadi's perfect balance, timing and rapid reflexes were an advantage in any style of fencing, so without much difficulty he won the individual sabre gold medal by 11 victories to 9. His brother Aldo won the silver medal. In the team sabre event, the Italian team supported their star fencer and cruised to an easy victory.

Nadi, carried in triumph by his opponents, added three team victories to his tally of two individual golds and his younger brother Aldo won three team gold and one silver to make the family total a record for any sport in one Olympic Games.