Champion Sydney trainer Chris Waller has rolled the dice and will bypass the Group 3 Ken Russell Memorial Classic with one-time favourite Imperial Force at the Sunshine Coast on Saturday.

Imperial Force has come up favourite for races in two states this weekend with a decision on which one he contests imminent.

Storm Boy has tightened his grip on favouritism for the $5m TAB Golden Slipper in three weeks on the back of another comfortable win at Randwick.

Jockey Tim Clark says there are parallels between debut winner Chateau Miraval and her Group-winning big sister.

Williams heads to Sydney to ride Miss Finland's grandson on debut