A belated decision to start Bull Point in The Rosebud on Saturday is behind the booking of Tommy Berry over regular rider Nash Rawiller.

Rawiller has ridden the colt at all three starts and as No.1 stable jockey for trainer Gai Waterhouse, he would have been expected to again have the mount.

Instead, Rawiller will partner Watabout for Allan Denham in the 1200m Listed race having ridden the filly to impressive wins at her past two starts.

"Nash had a prior commitment to Watabout," Waterhouse's racing manager Bruce Slade said.

"With Bull Point, we were still deciding where to go but he is going so well, here he is."

A $960,000 yearling, Bull Point has won two of his three starts.

His only defeat was by Eurozone who will again be among his rivals at Randwick.

Despite that result, Bull Point holds sway in early TAB fixed odds markets at $3 with Eurozone and Watabout on the second line of betting at $3.60 apiece.

Slade is confident the Waterhouse colt can turn the tables on Eurozone who will be the first stakes runner for the new training partnership of Bart Cummings and his grandson James.

"For sure. That other day the difference was he was less experienced and did a lot more wrong," Slade said.

"Eurozone jumped and put himself in a good position. We jumped slowly and had to settle back.

"You saw last start he (Bull Point) jumped a lot better, he was more professional and he should settle closer to the action on Saturday."

Waterhouse will also start Northern Glory in the race with Jim Cassidy to ride.

The filly finished third to Watabout last start and will meet that filly 2.5kg better on Saturday.

"She's got an opportunity for some black type and she's got that turnaround in the weights," Slade said.

"Last start she got stuck on the fence as well and nothing won on the fence all day.

"She is a nice filly and she is tough."

The Rosebud is one of the major lead-up races to the Group One Golden Rose at Rosehill next month.