Glenn McGrath has given embattled England a stark warning ahead of the 2015 Ashes by once again predicting a series whitewash for Australia.

The fall-out from England's shambolic Cricket World Cup campaign threatens to disrupt preparations for the Ashes, which get under way in July, unless coach Peter Moores can unite a set of players desperately short of confidence.

Crushing defeats at the hands of Australia, New Zealand, Sri Lanka and Bangladesh have ensured England can no longer reach the World Cup quarter-finals and prompted calls for Moores to leave his role for a second time.

Whatever the future holds for Moores, Australia legend McGrath, who took 563 wickets in 124 Tests, can see only one outcome when the sides resume their Ashes rivalry in England later this year.

McGrath is renowned for predicting 5-0 Ashes wins for Australia and told BBC Sport: "If the Australian team keeps playing as they are, they're going to go to England full of confidence.

"I can't see England beating them and I'm more than happy to predict 5-0."

Australia did win all five Tests when the sides last met in 2013-14.