Three-year-old Catch A Fire and her younger brother Seaburge will chase an important family double at Flemington.

And both are considered among the leading chances in their respective races.

Two-year-old Seaburge will be the first of the siblings to step out on Saturday and he is challenging for favouritism for the Group Two Sires' Produce Stakes.

Catch A Fire, also by Sebring out of Polska, will try to back up her last-start Angus Armanasco Stakes win when she contests the Group Two Kewney Stakes.

He made the leap from a maiden win to Group company last start and trainer David Hayes believes the filly has probably improved a bit again.

"This is going to be probably a race that's within reach for her again," Hayes said.

Seaburge won on debut at Pakenham but Hayes' hopes of running the colt in the $1.5 million Group One Blue Diamond Stakes on February 27 didn't eventuate as Seaburge was an emergency.

Instead he raced over 1300m at Sandown and finished second to Revolving Door who had also been a Blue Diamond emergency.

They cleared out from their rivals and clash again on Saturday.

"I think he's a real quality colt," Hayes said of Seaburge.

Seaburge is on trial to head to Sydney for the Group One Sires' Produce Stakes.

"If he gets the breaks from barrier one he'll be very hard to beat," Hayes said.