Cummins feels stress on his back, but not bowling depth

Pat Cummins hopes to be bowling at least one month before the start of the Ashes. (Dan Himbrechts/AAP PHOTOS)

Pat Cummins insists Australia have enough depth to cover any injuries to their pace cartel in the Ashes, as the struck-down quick set a loose target for his own bowling return.

Cummins has felt a lingering soreness in his back since Australia's Test series win in the West Indies almost two months ago, with scans since showing lumbar bone stress.