After celebrating his first city win with Net Worth, trainer Mitch Newman hopes to strike again at Rosehill.

Net Worth gave Newman a metropolitan breakthrough at Warwick Farm on October 16 - the sprinter's third start for the former champion Sydney apprentice rider.

By champion sire Fastnet Rock, Net Worth displayed mixed form under four different trainers before joining Newman's Hawkesbury stable.

"He was in pretty good order, but he just wasn't racing and showing the best that he used to show," Newman said.

"I took him back to trials and tried to make him show that bit of speed that he had, and he gradually got that back."

Newman thinks balancing the horse's eating habits has helped control his energy levels.

"I've been giving him a lot of swimming," the trainer said.

"He needs a lot of work this horse. He's a real good-doing horse, a real gross eater, and he needs the work to go with his eating habits."

Jockey Robbie Brewer will ride Net Worth in Saturday's Tynan Motors Handicap (1100m).

Like Newman, Brewer is a former champion apprentice, and the two lived together in Randwick when they were learning to ride racehorses.

"It'll be nice if he can get up and win on him for us," said Newman.

"It will be good for Robbie and it'll be good for me."