O’Brien has ground concerns for Australia

Aidan O’Brien is wary about the prospect of soft ground at Epsom next Saturday for Investec Derby favourite Australia.

The Galileo colt has been all the rage for the premier Classic since his close-up third in the 2000 Guineas at Newmarket on May 3.

However, Australia has not yet been tested in demanding conditions, with his trainer hoping the recent wet spell quickly recedes.