A decision on a Melbourne Cup start will be made after Forgot You runs in the Victoria Derby.

Impressive So You Think three-year-old Just Thinkin' is going to follow a tried and tested classic path this spring following his strong win in the Listed Dulcify Stakes at Rosehill on Saturday.

A win at Grafton on Tuesday will have trainer Carolyn Halliday looking at the $1 million Grafton July carnival with improving three-year-old filly Leica Bita Lippy.

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.

The pride of Gundagai was cruelled at the Rosehill Guineas barrier trial on Wednesday morning, but trainer Michael Murphy says Merlin Mustang is ready for his biggest test yet.