Hall said his mount Star Witness would take a power of beating in Saturday week's $1 million race at Caulfield.

Hall said the Danny O'Brien-trained colt would go into the Diamond on a "perfect" three-week break, while the Prelude winners had a two-week turnaround.

"That might have been their grand final and now they've got just two weeks to repeat it. My horse goes in with a good break between runs," Hall said.

"You know he'll be strong at the end of the 1200m. That was the strongest part of his win at Flemington.

"They'll fly in the Diamond and that will suit him ideally."

Star Witness, having his second start, brushed home his final 400m in the 1100m Talindert Stakes in 21.97sec at Flemington nine days ago.

Only Nicconi (21.48), Wanted (21.94) and Headway (21.82), all in the Group 1 Lightning Stakes, ran faster final 400m at the meeting.

Star Witness shares third favouritism at $8 with Crystal Lily, who has not raced since her dominant Diamond Preview win on January 26.

Co-trainer Mat Ellerton said the wins by Psychologist and Beneteau were "super impressive", but similar comments were made about his filly's victory.

"Obviously, it's going to be stiff opposition," Ellerton said. "All is well with her. We've just got to have her in the condition we had her in on Australia Day and we will be happy.

"Obviously the Diamond is a different sort of pressure, but I can't see the 1200m worrying her."

David Hayes, trainer of a record five Diamond winners, provides the other contender who wasn't seen on Saturday - Shaaheq, who produced a faster final 400m and 200m than Denman in the Zeditave Stakes when second to Crystal Lily in the Preview.

"I love two-year-olds who can run the fastest closing sectionals on the day. That told me she is ready to run a huge race," Hayes said.

He will also saddle up Evidentia in the Diamond.