Serena Williams has predicted an "interesting" semi-final between Sloane Stephens and Victoria Azarenka but can not call a winner.
Williams was knocked out by 19-year-old Stephens earlier today, and although anything is possible, the American knows that Azarenka will provide a tough test.
"Well, I think it's interesting," she said. "I think Sloane, she is in the semis now. That gives anyone a chance.
"I think Victoria is playing well. She's defending champion and a fan favourite. She handles the pressure really well, so we'll see."
Williams has struggled with injury throughout the tournament but refused to blame that for her defeat today.
Germany
Switzerland
Hungary
Scotland
