'We may be 1-0 down, but we know where we let ourselves down in the last two Tests, and where we need to improve. I'm certain that if we play our best cricket we'll win this Test match,' he said.

The Australian batsman also backed out-of-form bowler Mitchell Johnson and hoped that the left-armer will outshine Flintoff as the dominant performer in this series.

'Look back a couple of months, and Mitchell bowled outstandingly well against South Africa, both home and away,' said the ever-positive Clarke.

'He has done a fantastic job for us since Brett Lee has been out injured, and he bowled with good pace in the nets today,' he said.