It was Williams 's sixth title at Melbourne Park .
It moved Williams into a tie with fellow American Helen Wills Moody in third on the all - time list after Williams joined Martina Navratilova and Chris Evert on 18 at last year 's US Open .
It was Williams 's sixth title at Melbourne Park and it moved her into a tie with fellow American Helen Wills Moody in third on the all - time list after she joined Martina Navratilova and Chris Evert on 18 at last year 's US Open .