Cambridge trainer Roger James had the perfect entree to Saturday's Caulfield Cup when Zonza scored an uncomplicated win in yesterday's Snowhite Classic on the same track.
"Well, I thought she'd be competitive in a race like this after her overall form," said James.
"She's been first or second in 10 of her 12 starts before this."
James has Silent Achiever in Saturday's Caulfield Cup. The mare, a Derby winner, has drawn well at five for what is the biggest test of her career and bookies have tightened her quote into $7 with Royal Ascent.
Zonza earned her trip to the Melbourne spring carnival with her first-up Te Rapa victory.