It has been a basic tenet of bloodstock since the early days that Classic form is to be respected when a colt or a filly retires to stud. Some Classic results stand out, with the 1984 Prix du Jockey-Club often cited thanks to Darshaan (GB) leading home Sadler's Wells and Rainbow Quest in a trifecta of future superstar sires. As regards fillies, the 1990 Prix de Diane takes some beating, with Rafha (GB) coming home ahead of Moon Cactus (GB) and Colour Chart. All three ended up breeding at least...