A decision on whether Doncaster Mile winner Rangirangdoo backs up in the Queen Elizabeth Stakes will be left to the last minute.Trainer Chris Waller said he would monitor the gelding throughout the week but would not commit him to a start in Saturday's Group One over 2000 metres at Randwick unless he was completely happy.Waller said he was mindful of Rangirangdoo's first attempt at 2000 metres which came at the end of his spring campaign in the Mackinnon Stakes, the only unplaced run of his care

A decision on whether Doncaster Mile winner Rangirangdoo backs up in the Queen Elizabeth Stakes will be left to the last minute.

Trainer Chris Waller said he would monitor the gelding throughout the week but would not commit him to a start in Saturday's Group One over 2000 metres at Randwick unless he was completely happy.

Waller said he was mindful of Rangirangdoo's first attempt at 2000 metres which came at the end of his spring campaign in the Mackinnon Stakes, the only unplaced run of his career.

The trainer was more concerned with the seven-day back-up than the distance.

"He has only failed once, in the Mackinnon Stakes last spring, and that was on the quick back-up," Waller said.

"We will accept for the Queen Elizabeth and wait till the last minute.

"If he is fit and well he will run but I'd have no hesitation pulling the pin if he wasn't.

"We'll keep an eye on him through the week."

Waller changed Rangirangdoo's autumn program to include the Ranvet Stakes on March 20 to test him again over 2000 metres after his close second to Theseo in the Chipping Norton Stakes (1600m).

He ran another second to Theseo in a run that did not disappoint his trainer.

"It was always the plan to run in the Doncaster and use the Queen Elizabeth as the last run of his preparation," Waller said.

"We changed that to run in the Ranvet because I thought that would strengthen him up.

"In my opinion he does run out the 2000 metres and he will be given a Cox Plate preparation in the spring."

There will be no confusion over who rides Rangirangdoo with Nash Rawiller committed to Theseo if he runs in the Queen Elizabeth.

"I have already talked to Hugh Bowman," Waller said.

Waller and Rawiller found themselves in the NSW Supreme Court last week when trainer Gai Waterhouse challenged whether she had the right to appeal the stewards' ruling holding Rawiller to Rangirangdoo after she decided to run Theseo.

Justice Patricia Bergin ruled against Waterhouse who imported Darren Beadman from Hong Kong to ride Theseo who finished eighth in the Doncaster.

Rangirangdoo's stablemate, triple Group One winner Danleigh, will defend his crown in Saturday's All-Aged Stakes (1400m) after his fifth in the Doncaster.

"He ran a great race, he was a bit unlucky so he'll go back to the 1400 metres," Waller said.

The field for the All-Aged is expected to include Sydney pin-up mare Hot Danish and TJ Smith Stakes winner Melito.