It didn't go to script for New Zealand trainer Andrew Campbell at Flemington last Saturday.

But he hopes his next excursion to the races at Mornington on Wednesday will reap a far different result.

Campbell watched on at Flemington as Cauthen struggled in a Listed race and the horse's spring fate was sealed on Tuesday when he was ruled out of the Melbourne carnival because of shin soreness.

But on Wednesday, Campbell has Weissmuller in the Follow @Sportingbet on Twitter Handicap (1600m) and expects an improved showing from the four-year-old on the two runs he's produced in Melbourne this campaign.

Weissmuller was beaten two lengths over 1400m at Flemington and the same margin over the same journey at Sandown at his next start.

"He probably needed those first two starts. He had had five months off," Campbell said.

"I'm very happy with him and he's stepping up in distance which will suit him more.

"He's ready to rock and roll."

Weissmuller has won two of his eight starts including the Group Three Wellington Stakes (1600m) last season.

He has been nominated for the Caulfield Cup and Cox Plate but Campbell admitted those plans were ambitious.

"We put him in the Cox Plate just as a dream, but we won't carry on with that," he said.

"He came over as a stablemate for Cauthen, but he's got plenty of ability. You'll see that once he gets to 2000 metres."

Weissmuller's opposition includes the Anthony Freedman-trained import Fruehling who hasn't started since finishing fourth in the Group Three JRA Cup at Moonee Valley almost a year ago.

Fruehling is nominated for the Caulfield and Melbourne Cups and The Metropolitan in Sydney.

The eight-race Mornington card is a metropolitan fixture.