The 1973 Virginia Slims of Boston was won by which retired Australian player?
Margaret Court Margaret Court {'1': ", '2': ", '3': ", '4': "} (née Smith; born 16 July 1942), also known as Margaret Smith Court, is a retired Australian tennis player and former world No. 1. She is currently a Christian minister in Perth, Western Australia. In tennis, she amassed more major titles than any other player in history.
1979 Australian Open – Men's Singles Guillermo Vilas was the defending champion, and successfully defended his title, defeating John Sadri 7–6, 6–3, 6–2 in the final to win the Men's Singles tennis title at the 1979 Australian Open.