Gauff off to a flyer before Djokovic, Sinner begin Open quests
Novak Djokovic begins his bid for Grand Slam history later on a blockbuster day two and Jannik Sinner starts the defence of the trophy he won 12 months ago.
Carlos Alcaraz also gets under way at the first Grand Slam of the year as he looks to lift the one major title to elude him.
In the women's draw Iga Swiatek and two-time Australian Open Champion Naomi Osaka are both in action.
In-form Gauff laid down a marker as she swept aside former champion and fellow American Sofia Kenin in straight sets on Rod Laver Arena.