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

When Carlos Alcaraz is on court for a training session, perhaps working on his newly revamped service motion, he's doing so to buttress a game already good enough to claim four Grand Slam titles. He's also got his young rival,

Carlos Alcaraz has confessed that Jannik Sinner lives “in his head” when practising. The young champions have already formed an exciting rivalry and split the Grand Slams between them last year. They could now take it to the next level at the Australian Open, where they are on a collision course for their first Major final showdown.

Jannik Sinner, Carlos Alcaraz, Novak Djokovic, Coco Gauff and Iga Swiatek are some of the prominent players in action on the second day.

Former world number one Daniil Medvedev hopes to once again become a tennis "disruptor" by breaking the Grand Slam duopoly of young guns Jannik Sinner and Carlos Alcaraz.

Carlos Alcaraz says he is spurred on by Jannik Sinner's success as he bids to become the youngest man to complete a career Grand Slam.

Four-times Grand Slam champion Carlos Alcaraz said having a rival like world number one Jannik Sinner was good for his game as it pushes him to be at his best every time he walks on court.

Spanish superstar Carlos Alcaraz can become the youngest man to complete a career grand slam if he wins the Australian Open for the first time this month.