Irish horse trainer Aidan O'Brien has nothing but praise for his Australian import So You Think after the horse won by 10 lengths in his first race since being bought.

The former Bart Cummings stablemate made his debut in the High Chaparral BF Moores bridge Stakes and cruised down the straight to win 10 lengths clear without being hard ridden.

O'Brien said the horse had arrived in Ireland with an unbelievable reputation and was a " real product of Australian breeding, training and racing''.

He said they had never experienced anything quite like him before, he is unique.