Last updated on .From the section Tennis
The world number one is out of the Australian Open due to a leg injury.
He was going to play in the Kooyong Classic before the Australian Open starts.
Alcaraz picked up an injury when he was at his best.
Unfortunately, I won't be able to play in the Australian Open because I've worked so hard to get to my best level for Australia.
He said that he had to be optimistic and look forward. You should see you in the Australian Open.
After winning the US Open final in New York four months ago, Alcaraz became the youngest man to hold the world's number one ranking.
The men's top seed at the Australian Open will be Spain's Rafael Nadal, who won the title last year.
Alcaraz was unable to play in the Davis Cup due to an abdominal injury.