Daysee Doom will have to carry 58 kilograms if she is to defend the Group One Coolmore Classic.
The Ron Quinton-trained mare is topweight for Saturday's 1500m-feature for fillies and mares with her stablemate Dixie Blossoms next with 56.5kg.
The two six-year-old mares have been mainstays of Quinton's stable over the past few years but both are in their final preparations before heading to stud.
They have raced against each other throughout their careers and it is no different this time with the Queen of the Turf also a Group One target.
“They are both well and working well heading to the Coolmore,” Quinton said.
“They are not getting any better as they get older but they are still going well and wlll have a good gallop in the morning.
“It is a shame they have had to race each other so many times.”
There are 31 entries for the $600,000 race which has a field limit of 20.
The Waller-trained I Am Serious heads the TAB's first market on the Coolmore at $6 from a group including Dixie Blossoms at $11 with Daysee Doom among those on $15.
There were 21 entries taken on Monday for the Magic Night Stakes for fillies and 18 for the Pago Pago Stakes for colts and geldings with the two races the final chance to two-year-olds to force their way into the Golden Slipper field.
New Zealand Karaka Million winner Probabeel will test the water in the Magic Night for trainer Jamie Richards and Cambridge Stud owners Brendan and Jo Lindsay.