Serbian legend Novak Djokovic takes on German world number 2 Alexander Zverev, and Jannik Sinner meets Ben Shelton at the Australia Open men's singles semi-finals. Follow live updates from the sports ...

Margaret Court and Novak Djokovic played in two different tennis eras that were a world apart. Both were champions of their time and won 24 grand slam titles. Djokovic is aiming for more.

Reaching the top of the junior tennis world should indicate a player is on the path to tennis stardom — but there's a reason why that isn't the case.