Winx has faultless build-up to Doncaster

Trainer Chris Waller says star mare Winx has had a faultless build-up as she attempts to make history in the Doncaster Mile.

Winx had her final work-out at Rosehill on Thursday morning, galloping over 1000 metres and breezing up the straight in about 25 seconds.

She will put her incredible record on the line in Saturday's $3 million Doncaster as she chases a ninth straight win and sixth at Group One level.

"Her track work over the last two weeks since racing has been faultless, possibly even the best work she's ever shown according to her track riders," Waller said.