Stefanos Tsitsipas edged Jannik Sinner for the fifth time in six meetings to reach the AO quarterfinals for the fourth time in five years.
The American dropped out in straight sets and wasn't really sure what she could have done better.
"I felt that I don't want to lose instead of I want to win," world No. 1 said of Australian Open loss.
Alex de Minaur, the last Aussie standing, aims to topple nine-time AO champion Novak Djokovic.
Undefeated Aryna Sabalenka says stable state of mind crucial to winning her first Grand Slam title.
Novak Djokovic and Andy Murray concur on a simple schedule shift to prevent 4 a.m. finishes.
American depth is being showcased on the men's side in Melbourne.
