One Son - already a rarity in the racing world as the only progeny of his ill fated sire Best As Zariz – returns to racing with high expectations at Bathurst on Tuesday. The six-year-old hasn’t raced since April and has since looked the goods winning a trial at Canberra.

Canberra trainer Rob Potter feels he has the right formula for One Son and he is confident the gelding can add to his winning record.

“He is going better than he ever has. I have changed his work a lot and given him a good gallop last week then kept him fresh,” Potter said. “He will improve fitness wise off this run but I expect him to run a big race.”

One Son was never meant to be as his sire inadvertently mated with a mare when he was a younger horse. Best As Zariz was gelded shortly afterwards and the galloper was able to win six of his 15 starts before breaking down in the 2012 Gundagai Snake Gully Cup.

One Son – as his name suggests – is his only foal and is holding up the family name with some consistent performances. He has been placed at three of his five first-up starts and is ready to win more races, according to his trainer.

“I’m confident he is going as well as he ever has and he should progress to open class,” he said. “I wouldn’t have said that eight months ago, but his work is really good and his trial was enormous even though there was a lot of younger horses in it he did it really well.”

Potter is also using the subsequent form out of One Son’s win at Narromine in April as a guide to his future prospects: “There have been six subsequent winners out of that race and the form from his other win is also strong,” he added.

Bathurst holds fond memories for Potter as his stable star Murraguldrie won the Cup there in January. “He was my last starter there. Murruaguldrie is just back in work and I’m hoping his legs stay right and so far he is good,” he said. The Bathurst track is rated a Soft 5 for the seven-race program.