Australia will start favourites for the Ashes series against England later this year according to South African captain Jacques Kallis.

Speaking after his team completed victory by an innings and 20 runs on the fourth day of the third Test at Newlands yesterday, Kallis said Australia's strong pace bowling attack should thrive in English conditions.

"They will probably go in as favourites but it should be another good series," said Kallis, who missed the closing stages of his team's win because of a right groin injury suffered while bowling.

South Africa's win came despite an 86-ball century by Australian fast bowler Mitchell Johnson.