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?

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.

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

Jannik Sinner will try to put a doping scandal behind him when he kicks off his Australian Open defence against Nicolas Jarry, while Aryna Sabalenka's bid for a hat-trick of titles starts on Sunday against Sloane Stephens.

Daniil Medvedev ripped 24 aces and converted six break points to outlast Kasidit Samrej in a 3-hour, 8-minute first-round victory Tuesday at the 2025 Australian Open. No. 9 Andrey Rublev was the latest upset victim.

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 ...

Defending champion Jannik Sinner and 10-time Australian Open winner Novak Djokovic have landed in opposite sides of the draw for the season's first major, ruling out a replay of last year's semifinal encounter.