Peter Snowden has Group One aspirations for Ambidexter after the talented four-year-old resumed with a hard-fought victory in Saturday's Group Two Sebring - Theo Marks Sprint at Rosehill.

A full-brother to Group One-winning miler Skilled, Ambidexter is being aimed at races such as the Toorak Handicap (1600m) and Emirates Stakes (1600m) in Melbourne.

The son of Commands raced up to the Gai Waterhouse-trained Fat Al in the straight before the two went head and head over the final 200m.

Ambidexter ($7) prevailed by a long head over the favourite Fat Al ($3.60) with 5-1/4 lengths to Dystopia ($4.40) third.

"We'll look at the (Group Two) Shannon Stakes next start in two weeks and then we'll see whether we go to the Epsom the following week or the Toorak the week after," Snowden said.

"The plan originally was to go to the Shannon, then the Toorak, then to the Waterford Crystal Mile and then the Emirates Stakes."

Snowden tried to stretch Ambidexter out in distance last campaign when he finished fourth in the Group One Rosehill Guineas (2000m) and second to Fat Al in the Frank Packer Plate (2000m).

"I think he's just a sprinter-miler and that's what we're doing with him now," Snowden said.

Fat Al took up the running and leading jockey Nash Rawiller said the up-and-coming four-year-old was brave in defeat.

"I decided to take the lead up and he did that quite comfortably, but you can always envisage that's going to leave you a bit vulnerable late," Rawiller said.

"He was beaten eight times in the straight but I think he still might have poked his head back in front with 40 metres to go. It was a super effort."