The French rider won the 1975 Tour de France in front of Belgians Eddy Merckx and Lucien Van Impe. This stopped Eddy Merckx’s string of five victories in the race.

Thevenet also won the 1977 Tour de France in front of Hennie Kuiper of Holland and Lucien Van Impe of Belgium.

In addition, Thevenet was 2nd to Luis Ocana of Spain in the 1973 Tour de France.

Thevenet was also 3rd in 1974 Vuelta a Espana behind Jose Manuel Fuente of Spain and Joaquim Agostinho of Portugal.

In addition, Thevenet was 5th in the 1974 World Championship Road Race behind Eddy Merckx of Belgium, Raymond Poulidor of France, Mariano Martinez of France, and Giacinto Santambrogio of Italy.