Sagace (1980–1989) was a French Thoroughbred champion racehorse. His sire Luthier had been the Leading sire in France in 1976. Trained by Patrick Biancone and ridden by Yves St. Martin for prominent owner/breeder Daniel Wildenstein, at age three Sagace won two important races, then the following year scored a two-length victory in France's most prestigious horse race, the Prix de l'Arc de Triomphe. Sagace came back to win his second Arc in 1985 but following a claim of interference by the handlers of Rainbow Quest, the Hippodrome de Longchamp disqualified him to second. Nonetheless, Sagace's performances for 1985 earned him European Co-Champion Older Horse honors.