All News Melbourne - Novak Djokovic battled with a lower back injury as he claimed his 11th round of 16 appearance at the Australian Open on Saturday. In Focus Melbourne - Novak Djokovic battled with a lower back injury as he claimed his 11th round of 16 appearance at the Australian Open on Saturday. BreakingNews of Melbourne - Novak Djokovic battled with a lower back injury as he claimed his 11th round of 16 appearance at the Australian Open on Saturday. Your Interested Follow Story Melbourne - Novak Djokovic battled with a lower back injury as he claimed his 11th round of 16 appearance at the Australian Open on Saturday.