 In the spring of 1963, Relko won the Prix de Guiche and the Poule d'Essai des Poulains at Longchamp and was then aimed at The Derby.At Epsom on 29 May, Relko was sent off the 5/1 favourite in a field of twenty-six runners.Ridden by the 21-year-old Yves Saint-Martin, Relko tracked the leading group in the early stages before moving up into third place early in the straight.