1984 Australian Open – Women's Singles

Martina Navratilova was the defending champion, and entered this tournament with a record 70-match winning streak, and 6 consecutive Grand Slam titles. However, she was upset in the semifinals by Helena Suková. Despite this loss and failure to complete the elusive Calendar Year Grand Slam, her 74-match winning streak remains the longest in professional tennis history.

Chris Evert won the tournament, defeating Suková, 6–7^(4–7), 6–1, 6–3.