Osaka won 6-3 6-4 as Williams’ quest to reach a ninth Australian Open final and match Court’s 24 major singles titles.
“The difference today was errors. I made so many errors.
“Honestly, it was opportunities where I could have won. I could have been up 5-0. It was a big error day for me,” 39-year-old Williams said.
When pressed on what caused her to make so many mistakes, tears began to flow as she told reporters: “I don’t know. I’m done,” before walking out.