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 was trying to "battle test" some new shots in his win over Marcos Giron because Carlos Alcaraz "still has an extra gear" - believes Jim Courier.

Recognized as one of the young guns to beat, Sinner rose to the challenge in the second part of 2023. The Italian reached the Wimbledon semi-final and scored 32 wins in the final 37 matches of the year. The youngster claimed his first Masters 1000 crown in Toronto.

The world’s number-one tennis player is winning majors and dominating his rivals. Now comes the hard part.

MELBOURNE - Defending champion Jannik Sinner was not at his fluent best but still had too much firepower for unseeded American Marcos Giron as he sealed a 6-3 6-4 6-2 win and reached the fourth round of the Australian Open on Saturday.

Defending champion Jannik Sinner has defeated 46th-ranked Marcos Giron of the U.S. 6-3, 6-4, 6-2 at the Australian Open.

World No 1 Jannik Sinner makes it 16 wins in a row; No 5 seed Daniil Medvedev dumped out of Australian Open by 19-year-old American Learner Tien in five-set epic; Nick Kyrgios and Thanasi Kokkinakis p

Defending champion Jannik Sinner had his feathers ruffled early on by local wildcard Tristan Schoolkate on Thursday before recovering his ice-cool composure to reach the third round of the Australian Open with a 4-6 6-4 6-1 6-3 win.

(AP Photo/Vincent Thian) Jannik Sinner, of Italy, holds up the championship trophy after defeating Taylor Fritz, of the United States, in the men’s singles final of the U.S. Open tennis championships, Sunday, Sept. 8, 2024, in New York. (AP Photo/Julia N ...

Alexander Zverev is the number 2 seed at the Australian Open 2025, the first Grand Slam tournament of the season. Ahead of him is only Jannik Sinner, the first seed of the tournament, while the German is ahead of Carlos Alcaraz.

The two defending champions, Jannik Sinner and Aryna Sabalenka, enter the 2025 Australian Open as favorites to win in Melbourne again.

Jannik Sinner, Carlos Alcaraz and Novak Djokovic lead the men’s field at the 2025 Australian Open. The year’s first Grand Slam tournament begins on the hard courts of Melbourne Park on Sunday morning local time,