The 1949 event was cancelled due to the death of Prince Louis II; it was included in the new Formula One World Drivers' Championship the following year. The race provided future five-time world champion Juan Manuel Fangio with his first win in a World Championship race, as well as third place for the 51-year-old Louis Chiron, his best result in the World Championship era. However, there was no race in 1951. In 1952, the first of the two years in which the World Drivers' Championship was run to less powerful Formula Two regulations, the race was run to sports car rules instead, and it did not form part of the World Championship.