"I still created lots of opportunities and I felt I was stepping up a lot, and I just felt that was the biggest difference today."

"Even before the match, I think she's the favorite for the tournament. She's been playing really well, and it's gonna be tough," added the Serb.

Before Pavlyuchenkova knew it would be Williams she would face in the quarters, the 20-year-old said, "I don't know what to say about her. She's just awesome and a great athlete and she's showing good tennis so far. So I don't know what to say, really.

"I'm just going to go out there and -- I'm going to say that I don't want to go out there and enjoy just being on the center court playing against Serena. I would like to do well, try to fight and with my effort I try to beat her. But of course I respect her a lot as well. She's just great."

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