It's the second consecutive year that Ruud has dealt with injury troubles in Melbourne.
Sorana Cirstea ended 2019 finalist Petra Kvitova's AO early for the second straight year.
Alexander Zverev shows support for Australia's decision and sympathy for Novak Djokovic's treatment.
The American hopes to learn from her surprise loss to China's Wang Qiang on Day 1.
The Spaniard also said he'll never go against justice.
Carlos Alcaraz has big aspirations.
A look at the ten teenagers playing the Australian Open singles event.
