Sinner regained focus quickly Monday and began his Australian Open title defense with a 7-6 (2), 7-6 (5), 6-1 win over Nicolas Jarry.

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

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.

In the lead-up to the match, Jarry told Chilean newspaper La Tercera that he wished he had 'the same support' as Sinner from tennis authorities.

After all the pre-tournament attention on the 2024 doping cases of Sinner and long-time women's No. 1 Iga Swiatek, both started the year's first Grand Slam tournament about the same time on nearby courts on Day 2.

Jannik Sinner will face another player who has tested positive for a banned substance in the first match of his title defence at the 2025 Australian Open. Nicolas Jarry has admitted he “would have liked the same support” he feels Sinner received after his own failed tests.