Ruby Walsh could be in line to ride Bashboy when the horse bids for an historic third victory in the Australian Grand National on Sunday.

Cirrus Des Aigles is unlikely to defend his crown in the Investec Coronation Cup at Epsom after breaking a shoe at Longchamp on Sunday.

Big-race rider Luke Nolen is confident Australian superstar Black Caviar will not be inconvenienced by the prospect of soft ground in the Diamond Jubilee Stakes at Ascot on Saturday week.