Australia's Test captain Pat Cummins is targeting the T20 World Cup in India and Sri Lanka in February after being ruled out of the final two Ashes Tests due to a back injury. Cummins, who returned successfully in the third Test, stated playing consecutive matches was a high risk. Head coach Andrew McDonald expressed uncertainty about Cummins' T20 World Cup availability, awaiting further assessment. Veteran spinner Nathan Lyon also faces a lengthy layoff after hamstring surgery.