Prix d'Ispahan
Tanerko began his third season with a victory in the Prix d'Harcourt, beating Tapioca and Fric. On his next appearance, the horse repeated his 1957 success in the Prix Ganay, beating Blockhaus and Primesautier, two horses who went on to finish first and second in the Prix d'Ispahan. In July, Tanerko won the Grand Prix de Saint-Cloud, beating the four-year-old filly Denisy who had finished second in the 1957 Arc de Triomphe, with Flying Relic in third.