Ascot Gold Cup
Rantzau's sire, Foxlight, was one of the best sons of the French stallion Haras du Pin, and also had the blood of Bay Ronald in his pedigree. After a notable career at the track, Foxlight retired to stud duty where he was quite successful, producing both flat racers and steeplechasers. His racing blood included that of Foxlaw (winner of the Ascot Gold Cup and Newmarket Jockey Club Stakes) and Foxhunter (winner of the Ascot Gold Cup).