"I lost against a great opponent," said Rafael Nadal.
The men's and women's quarterfinals will be completed on Day 10, and there is doubles, mixed, juniors and wheelchair around the grounds as wello.
The Swiss matched his record for most match points saved in a victory on Tuesday in Melbourne.
"Nick Kyrgios can be No. 1 in the future easy," says Goran Ivanisevic.
"I have more confidence, I feel better," says Novak Djokovic ahead of Roger Federer rematch.
"I could just as easily be in the semis right now, but I'm not," said Tennys Sandgren.
Stan Wawrinka believes he's playing his best tennis since he returned from knee surgery in 2018 and eye testers agree.
