Australian equestrian veteran Stuart Tinney is eyeing a third win in four years at the Adelaide International Three-Day Event.
Tinney triumphed in the annual event last year and in 2009, and looms a favourite riding Pluto Mio when competition starts on Friday.
"Pluto Mio is a very nice horse. He has just won the NSW state championships a few weeks ago, so he's going well," Tinney said.
The Sydney Olympic Games teams eventing gold medallist said each of his previous triumphs at the Adelaide event, a stage of the worldwide FEI Classics, was difficult to compare.
"The two times I won it previously, they were on different horses and this is a different horse again," he said.
Among Tinney's chief competitors in Adelaide will be Shane Rose, a member of Australia's silver medal winning eventing team at the Beijing Olympics four years ago.
But another member of the silver medal winning team, Megan Jones, has withdrawn from the Adelaide event.
Jones decided to retire her mount, Kirby Park Irish Jester, due an adductor injury in the 19-year-old horse.
The Adelaide event is the second round of the FEI Classics, which carry $US333,000 in prizemoney.
The top five riders from the six rounds will take shares of the prizemoney with $US150,000 awarded to the winner.
New Zealander Andrew Nicholson leads after the opening round in France, ahead of German Michael Jung and Brit William Fox-Pitt, who won a silver medal at this year's London Olympics.
Fox-Pitt will attend the Adelaide event but won't compete.