Long Leaf winning the Blue Diamond Preview for colts and geldings, with Damien Oliver aboard (Image: Racing Photos)

Long Leaf winning the Blue Diamond Preview for colts and geldings, with Damien Oliver aboard (Image: Racing Photos)

Coolmore won't split star 2YOs

Coolmore Australia has no intention of keeping apart their best colt and best filly in this month's Group 1 Blue Diamond Stakes, according to general manager Michael Kirwan.

The global racing giant's champion Australian stallion Fastnet Rock has colt Long Leaf and filly Ennis Hill both prominent in the market for the $1.5 million race for two-year-olds on February 24.

It had been mooted that Ennis Hill might be also nominated for the G1 Black Caviar Lightning (1000m) and/or G1 Oakleigh Plate (1100m) to keep the pair apart - a practice that is common with Coolmore in Europe.

But Kirwan said on Monday that circumstances in Australia meant Coolmore had little choice but to run its best colt against its best filly in the Blue Diamond.

"To be fair, racing is quite different in Europe," Kirwan said.

"Basically, as a rule, fillies don't run against colts in these type of races because generally there are Group 1 races for fillies and Group 1 races for colts.

"We don't have that situation down here and it should be addressed in my mind.

"There are no Group 1 races for two-year-old fillies here so you have no other choice but to run against each other."

WATCH: Ennis Hill's Chairman's win

Kirwan said discussions had taken place over recent years to establish such a Group 1 race for two-year-old fillies, but he said there was little movement from officials as yet.

"We've had discussions with various entities about that but it's fallen on deaf ears I think," Kirwan said.

"I think the talk about the Percy Sykes is gathering momentum for it but there should be one in Victoria also.

"It will happen in time but when I don't know."

The Percy Sykes is a Group 3 race for two-year-old fillies with a purse of $600,000 run over 1200 metres during The Championships at Randwick.

Kirwan said that both Long Leaf and Ennis Hill were most likely to take their place in the Blue Diamond given no problems in the lead-up.

"I think it's fair to say that both are being trained for the Blue Diamond, at the moment anyway," Kirwan said.

"That's the plan. Obviously its two weeks from the race but it's the intention at the moment that both horses be trained for that race."

WATCH: Long Leaf's Preview win