Jannik Sinner and Aryna Sabalenka will be the defending champions at the 2025 Australian Open - but who will their biggest rivals be in the singles draws?

Men’s World No. 1 Jannik eyes second successive singles title at Australian Open starting today, while Aryna, leader of the women’s rankings, is gunning for her

Defending champion Jannik Sinner lost his first set since October but recovered to beat Tristan Schoolkate and reach the third round of the Australian Open.

Where is Aryna Sabalenka from? Sabalenka ... Along with Sabalenka, several other big names in the tournament such as Daniil Medvedev and Andrey Rublev are also competing under no national flag.

Sinner upset Djokovic in the semifinals here last year before coming back to beat Daniil Medvedev in the final 3-6, 3-6, 6-4, 6-4, 6-3 for his first Grand Slam singles title.

Russia's Daniil Medvedev reacts during a press conference ahead of the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 10, 2025. (AP Photo/Ng Han Guan) Aryna Sabalenka ...

A “hot-headed” Novak Djokovic sent an Australian Open warning to join Carlos Alcaraz and Alexander Zverev in the Last 16 on Friday, but Naomi Osaka’s bid for a third Melbourne crown is over with injury.

Badosa has been a long-time friend of Belarusian world No.1 Aryna Sabalenka, who Kostyuk refused to shake hands with at the French Open in 2023. The Spanish No. 1 will play the winner of Jessica Pegula and Olga Danilovic in the last 16.

Catch up on the latest Australian Open 2025 results from day 4 and 5, including top seed progressions and significant upsets at Melbourne Park.

The 113th Australian Open is underway, kicking off the first Grand Slam of 2025. We'll show you where to watch the Australian Open globally.

Second-seeded Swiatek next faces 2021 US Open champion Emma Raducanu, who recovered from an early break in the second set to hold off Amanda Anisimova 6-3 7-5