The 33-year-old, who damaged his hamstring during his side's recent triangular series in Zimbabwe, has already been ruled out of the upcoming one-day international series against Pakistan.
Clarke may be available to feature in the two-Test series which gets underway on October 22, however, and he will put all of his faith in team physio Alex Kountoris.
"Alex knows my body very well," Sky Sports News quotes the Aussies skipper as saying. "He'll be the one that gives me the all clear to play the Test matches if he thinks I'm fully fit. If I pass what Alex needs me to pass that will give me a lot of confidence as well."