No need to panic and start with the knee-jerk reactions. Now is the WORST time you could make changes. Look at England and how they reacted after a thrashing at Lord's. They (sensibly) did'nt panic and kept an unchanged team and subsequently won the next test.
Remember Martyn's long form slump? Look at him now. Clarke scoring 127 runs in 7 tests? Hit a crucial 91 at Lords and ended his form slump.
The Aussie batsmen, management and selectors will not panic however, and that is all that matters in the end.

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