For the second time in as many runs the connections of Palentino have had to endure a protest hearing after being first across the line at Flemington.

Two weeks ago the large team of owners were left grim faced after stewards took the CS Hayes Stakes off them, but the roar was deafening when the protest result went their way in the Group One Australian Guineas on Saturday.

Craig Newitt aboard the runner-up Tarzino alleged interference against Palentino, ridden by Mark Zahra, at the 600m and again in the straight.

In the CS Hayes Zahra came out and forced Tivaci wide in a move which subsequently cost him the race, but this time Jameka caused Palentino to shift on to Tarzino.

Chierf steward Terry Bailey told Newitt when in dismissing the protest that his mount had rolled in at the top of the straight and while the two horses raced tightly they were not comfortable in upholding his objection.

Palentino ($10) held out Tarzino ($8.50) by a short head with Risque ($17) a half length away third.

Zahra was confident of retaining the Guineas but admitted to nerves.

"It was a shame we had to go through all that because you can't enjoy the moment and then you have to sweat it out," Zahra said.

"It means a lot and I said after last time, I'll cop that as long as we win the Guineas.

"It turned out to be a pretty tough job, but we got there."

Zahra said Palentino was still a work in progress but the horse loved a fight.

Trainer Darren Weir said he would let the dust settle on the win before deciding on whether Palentino continues his campaign to Sydney.

The runner-up is Sydney bound for the Rosehill Guineas and ATC Australian Derby after coming from last.

Trainer Mick Price said it wasn't the plan to ride him from last, preferring to settle in a midfield position.

"The big dumbo fell out of the gates as he does," Price said.

"I wanted to be midfield and Craig was always of the thinking of getting out and getting plenty of room.

"The race worked out OK for us in the end and I was really happy with the horse."

New Zealand visitor Xtravagant was sent out the $2.70 favourite and after leading weakened to finish eighth.

Jockey Matt Cameron said the colt had every chance.

"He led and he travelled sweet, changed legs, but maybe got a little bit tired that last little bit," he said.