If the doubters are right and favourite Red Tracer fails to run the 1600 metres of the Myer Classic, there's every chance Chris Waller will still walk away with the winning trainer's trophy.

Waller has designated four-year-old Catkins as the natural successor to her older stablemate Red Tracer and the two will be rivals in Saturday's Group One.

Catkins is raced by the Ingham family whose patriarch Bob Ingham gave Waller's career a major boost when he appointed him as the trainer of his new racing venture after he sold his Woodlands operation to Sheikh Mohammed in six years ago.

Red Tracer, winner of the Tatt's Tiara over her pet distance of 1400m, is the raging Myer favourite but Catkins' win in last Saturday's Group Three Eliza Park International (1600m) has stamped her a worthy contender.

"In my eyes, Catkins is the next Red Tracer," Waller said.

"She is a great back-up to have."

In saying that, Waller has confidence in Red Tracer who has already dispelled the notion she is simply a wet-track specialist and will be out to prove she can run the distance.

"Now that she's getting older, I think she can handle it better," he said.

"She's a six-year-old now and despite never winning at a mile, I think she can."

Red Tracer's autumn performances included close seconds in the Coolmore Classic and Queen Of The Turf Stakes to Appearance, a surprise winner of last year's Myer for trainer Guy Walter and Sheikh Mohammed's Darley operation.

It is that result Darley is looking at as a pointer to the chances of Cameo in the Myer with the mare at $41, the same price Appearance was a year ago.

"We won the race last year with Appearance who was an outsider so maybe it could happen again," Darley's Jason Walsh said.

"Cameo is an on-speed runner and a top three chance."

Second to Catkins at Moonee Valley, Cameo won the Keith Nolen Classic at Kembla Grange in March, a race also won by Appearance on her way to greater things.