Bella Nipotina creates history with The Everest victory ahead of Giga ...

Leading trainer Ciaron Maher has capped off a stunning day by adding a Caulfield Cup win to his earlier triumph in The Everest.

Maher's charge Duke De Sessa — ridden by Harry Coffey — claimed victory in the $5 million Caulfield Cup late on Saturday afternoon.

Duke De Sessa held off a late challenge from pre-race favourite Buckaroo in the 2,400-metre handicap.

Maher could not attend the Caulfield Cup as he was in Sydney to see seven-year-old mare Bella Nipotina win the $20 million The Everest at Randwick.

Ridden by Craig Williams and trained by Maher, Bella Nipotina went wide and finished strongly in the straight to win narrowly from 2022 winner Giga Kick in the world's richest race on turf.

Bella Nipotina is the first mare or filly to win the 1,200m race.

Craig Williams rode Bella Nipotina to a stunning victory in The Everest. (AAP: Bianca De Marchi)

Growing Empire was third, with Lady Of Camelot fourth.

Maher, who also trains Growing Empire, was emotional after his first win in the race, before a packed crowd at Randwick.

"She's a beautiful horse to train," he told the Seven Network.

"She's been elite for the last five years and, yeah, it's unbelievable."

Bella Nipotina earned connections $7 million with the victory.

Godolphin colt Traffic Warden was a late scratching after becoming fractious in the starting gates.

The Everest was run for the first time as a Group 1, the official top-tier status that had been previously denied it since its inception in 2017 due to its novel slot race format.

AAP