It is hard to imagine champion trainer Gai Waterhouse has never won the G1 Australian Derby on her home turf at Randwick, but that could all change this afternoon.

Emerging three-year-old Laser Hawk gave champion trainer Gai Waterhouse her second G1 Rosehill Guineas winner with an impressive display holding out kiwi gallopers Ocean Park and Silent Achiever in a close finish at Rosehill Gardens last Saturday.

Laser Hawk held off a brave New Zealand challenge to claim the Rosehill Guineas this afternoon, handing star jockey Nash Rawiller a 39th Group 1 triumph.

Laser Hawk held off a brave New Zealand challenge to claim the Rosehill Guineas this afternoon, handing star jockey Nash Rawiller a 39th Group 1 triumph.