Three-year-olds Dio D'Oro and Toulouse will go their separate ways when they reappear at Rosehill after being joined together in a photo-finish the last time they raced.
The pair met over 1400m on June 30 and could not be split but have different objectives this spring.
After some rain on Thursday night but not as much as predicted, Rosehill was in the soft range on race eve.
Dio D'Oro has won three races, two on heavy and one on soft ground.
“Obvously rain suits him but we're keen to find out if he is just a wet tracker,” Portelli said.
“This will also be a bigger test to find out if he is up to these horses heading to a race like the Golden Rose.
“It's a strong field.”
Performer was at $4.60 on Friday, edging Plague Stone ($4.80) for favouritism while Dio D'Oro was a $15 chance.
The Chris Waller-trained Performer is on the second line of TAB betting for the Golden Rose (1400m) on September 22 with his stablemate, The Autumn Sun, heading the market at $6.
The Autumn Sun will also be at Rosehill on Saturday, but not to race.
After failing to jump in six official trials this year, the multiple Group One winner must leave the gates with the field, otherwise he will be barred.
Toulouse will not be heading to the Golden Rose with Payne keen to step him up to the Gloaming Stakes (1800m) and Spring Champion (2000m) before he tackles the 2500m of the Derby at Flemington.
The first of those seconds came when he was beaten on debut in April by The Autumn Sun.