Serena Williams has declared that she is surprised by her current level of form after she reached her 35th Grand Slam quarter-final earlier today.
Williams believes that she is playing her best tennis for some time and thinks that she has a good chance of extending her fine record at Melbourne Park.
She said: "I thought I played really well, I didnt expect to play so well, I was like 'wow'. I saw I served 95% in the first set, I was thinking 'Who is this girl? It's not me!'
"I've had a great career, especially here in Australia. Sloane Stephens is playing great, I think she has incredible talent. It will be a tough match but I feel like I have nothing to lose and am playing really well."
Williams goes up against teenager Stephens in an all-American quarter-final later this week.