Sergi has Island Bay Boy as one of 14 runners in the $1.3 million Kosciuszko (1200 metres) at Randwick on Saturday.

He's been loving the rain, given his four-year-old gelding has two runs on soft and heavy tracks for two wins - not to mention being bred to love the mud.

While Island Bay Boy can produce on all types of tracks, he felt the likely wet would bring some of the other horses back to the field.

Sergi's happy with the condition the son of All Too Hard was in ahead of the feature race for country trainers.

He's won the listed Canonbury Stakes and ran second in the Black Opal Stakes, but The Kosciuszko will be the biggest of them all.

But with all the COVID chaos he's not sure he wants to risk being around 10,000 punters in Sydney - he'd feel terrible if he was to catch the virus and bring it home to his family.

Plus, there'd potentially be two weeks' quarantine to worry about. Even if he can go.

"It's one of the biggest days in my racing career," Sergi said.

"I've won plenty of races in Sydney, I've won group races, but this is the most prize money ever and it's a pretty high-profile race.

"It is a big day and you want to be there for it, but we'll see."

Sergi said there were 13 threats in the field, which would be led by Canberra trainer Keith Dryden's Handle The Truth - a past Kosciuszko winner and the $4.40 favourite.

Randwick was rated a heavy8 on Friday and would likely be rated at least soft come Saturday.

"Horse is looking great. He's going well, eating up everything, his work's been fantastic so I've got no issues with the horse," Sergi said.

"The wet track's probably an advantage as well because he doesn't mind the wet.

"He's won on a heavy track and I think the breed - through the mare's side, as well as All Too Hard - they tend to go through the mud so it's never been an issue for him.

"I think the wet track just brings some of the others back to him."