Trainer Jason Warren was relieved to win with one well-related galloper at Geelong on Thursday and he is confident of doing likewise with another at Flemington on Anzac Day.

Warren has Cox Plate winner Shamus Award's older half-sister Double Dee in Friday's Kokoda Track Handicap, a day after producing stable star Bel Sprinter's younger brother Bel Rain to win on debut at Geelong.

Double Dee is also entered for the Group Two Queen Of The South Stakes at Morphettville on Saturday but Warren said the mare would run in Melbourne after drawing wide in both races.

"We toyed with the idea of taking her to Adelaide but when she drew the outside barrier in Adelaide we thought we'd go with the outside barrier at home, rather than going all the way over there," Warren said.

"We're going to run her at Flemington. She'll be very hard to beat there."

The winner of four of her 16 starts, Double Dee is favourite for Friday's 1610m race.

Warren is looking to take Double Dee to Queensland in search of valuable black type during the winter carnival.

Three-year-old Bel Rain stepped out in a 1200m maiden on the synthetic track and pressed forward from the outside gate before going on to score by two lengths.

"I was very relieved to see him step out and do what he did," Warren said.

The trainer said he had taken his time with Bel Rain in the belief he was better than average.

"He's not the horse Bel Sprinter is but he's certainly above average," he said.

Bel Sprinter's career has included a victory in the Group One Galaxy last year and a second in the KrisFlyer International Sprint in Singapore.

The six-year-old hasn't won this season but gets another chance in the Group One Goodwood in Adelaide on May 10.

"Hopefully we get a dry track," Warren said.