A decorated racing family has built on its rich connection to the Blue Diamond Stakes as Hayasugi led in a fillies' clean sweep of the $2 million race.

In the finest moment of his career, Clinton McDonald became a third-generation trainer to claim Victoria’s most prestigious two-year-old event at Caulfield.

Two decades after winning his first Group 1 race, McDonald celebrated a fourth at the elite level with a salute to two family members who left an indelible mark on the Australian turf.

McDonald’s grandfather Bon Hoysted trained the champion sprinter Manikato to win the 1978 Blue Diamond and 11 years later Courtza won for his father Ross.

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