Five years ago Chris Waller experienced the highs and lows of Group One racing for the first time.

The up-and-coming trainer watched in shock as outsider Triple Honour swooped on three-year-old champion Weekend Hussler in the Randwick Guineas, forcing the judge to use the photo-finish.

The decision eventually went the way of the favourite Weekend Hussler by a nose.

"I was in shock," Waller said.

"It looked like a dead heat and I thought we'd won our first Group One."

Waller's first Group One came a month later when Triple Honour outstripped his Randwick Guineas performance to win the prestigious Doncaster Handicap.

Things changed rapidly after that breakthrough with former New Zealander Waller at the top of the tree in Sydney with two premierships under his belt and an unassailable lead as he powers towards a third.

The Group One winners have also flowed and he goes into Saturday's Randwick Guineas (1600m) double handed with Sacred Falls and Tougher Than Ever.

The two colts are both Group One winners in New Zealand and have been added to the Waller stable this autumn.

Waller has already taken first blood for the carnival with Shoot Out defending his Chipping Norton Stakes last Saturday and rates his Guineas contenders highly against favourites Rebel Dane and Proisir.

"The are both well," Waller said.

"Tougher Than Ever is coming back to his own age group.

"We scratched Sacred Falls from his last start because it was a heavy track and I don't think he handles it even though he won on slow in New Zealand."

Tougher Than Ever, who raced as Warhorse in New Zealand, finished second to Alma's Fury in the Group Two Apollo Stakes on February 23 run on a heavy track.

He was among original Chipping Norton entries but Waller gave him a barrier trial on March 5 instead.

Sacred Falls missed the Hobartville Stakes won by Pierro last Saturday week and has not raced since he finished midfield in the Royal Sovereign Stakes on February 16 won by Guineas rival Rebel Dane.

Corey Brown rides Sacred Falls, replacing regular partner Leith Innes who will remain in New Zealand for the Oaks meeting at Trentham.

He rides More Than Sacred in the Group One classic for the Raffles Syndicate which also races Sacred Falls.

Jim Cassidy will be aboard Tougher Than Ever with James McDonald reuniting with It's A Dundeel.

Rebel Dane and Proisir, who finished second and third behind Pierro in the Hobartville Stakes, are $3 equal Guineas favourites with It's A Dundeel at $7.50.

Sacred Falls and Tougher Than Ever are at $11 and $13 respectively.