The Chris Waller-trained import Captain Cook has landed his first Australian win at his fourth attempt, edging out Sully by the barest of margins in the Group Three JRA Cup at The Valley.

Captain Cook's victory by a nose in Friday night's 2040m race denied the Trent Busuttin and Natalie Young stable a winning treble, with Sully's runner-up finish coming after wins by Barcali and The Holy One.

Waller said it was a deserved win for the former English horse who had finished fifth in a 1600m-handicap at Caulfield and was placed at both Caulfield and Flemington in his next two starts.

"It was close. Very exciting," Waller said.

"I think it was a well-deserved win. The horse has been knocking on the door without a lot of luck and he had to do it the hard way today.

"Our intention wasn't to lead but Linda (Meech) took the initiative to go forward when it looked like she was going to get caught wide. So well done to her."

Waller indicated the $400,000 Listed Cranbourne Cup (2025m) was an attractive option for the seven-year-old gelding's next start.