Coco Gauff and Jannik Sinner were among the top tennis stars to advance through first-round victories Monday at the 2025 Australian Open. Stefanos Tsitsipas, Grigor Dimitrov and Victoria Azarenka left Melbourne early.

Join our writers for updates on day two of the year’s first grand slam at Melbourne Park.   02:53 The standard of play in this fourth set is higher than the three before it with Tsitsipas liberated by his rage and Michelsen fighting fire with fire.

The two best men's players in the world are reconfiguring the sport before their opponents' eyes. They don't know what to do about it

The top-ranked Sinner, who is the defending champion at Melbourne Park, and No. 3 Alcaraz are coming off a 2024 season in which they each won two Grand Slam titles.

Jannik Sinner will make his official debut in 2025 at the Australian Open tomorrow. The world number 1 will face the Chilean ace Nicolas Jarry in the first round, in a match that could hide some pitfalls. However, there is no doubt that the Italian champion is the top favorite to win at Melbourne Park this year and confirm the title won in 2024.