The racetrack career of All Too Hard is over with the half-brother to Black Caviar officially retired on Sunday.
Vinery Stud has shelved plans to race the colt at Royal Ascot and he goes out a last-start winner of the All Aged Stakes at Randwick.
The latest international rankings rated All Too Hard Australia's second-best racehorse behind Black Caviar, who was rated the highest-ranked horse in the world.
"It was a difficult decision for us to retire a colt with so much more to offer as a racehorse," Vinery's general manager, Peter Orton, said.
"All Too Hard has done all we could have asked for and more.