Jelena Dokic's stunning performance in the tournament has prompted unprecedented interest around the host country.
Dokic has been a ratings winner for Channel 7 and she's become the night-time queen on Rod Laver Arena because of her pulling power with TV audiences.
Channel 7 has been keen to push the scheduling of Dokic at night on the showcase court to maximise prime-time ratings.
A national audience nearing three million viewers is tipped for her quarter-final match with no cricket being televised on rival network Channel 9.
Dokic's first four matches of the Open have generated peak audiences of about two million viewers.
Her fourth-round clash against Alisa Kleybanova attracted 2.3 million viewers.