Two seeds advance; two seeds are sent flying

On Day 4 of the Commonwealth Bank Tennis Classic, two out of of fours were ousted, while the other two passed their second round tests to reserve a spot in the quarters.

No.3 seed and No. 4 seed Flavia Pennetta and Nadia Petrova were the first seed to move into the quarters; Pennetta winning her match to Anastasia Rodionova, 63 75; while Petrova won her match to Tathiana Garbin, 61 61.

"It was very tough out there for both of us; I was really struggling with the heat and humidity and it seemed in the second set I couldn't breathe anymore," Pennetta said. "Then I noticed she wasn’t feeling good either. She called the physio at the next changeover and again at 5-2. Maybe that made me more focused, and I'm very happy to be in the quarterfinals."

The two ousted seeds were No. 7 seed Sara Errani and No.9 seed Peng Shuai, Errani falling to Tamira Paszek in straight sets, 60 76(2); and Shuai falling to Chan-Yun Jan, 61 75.

"I tried to forget about who I was playing because if I thought about it, it would be really hard," Chan said of Peng. "We are very good friends off the court.

"I found it hard at the start of the week when I came here with the heat and the humidity, but I feel a lot more comfortable now and I have nothing to lose in tomorrow's quarterfinal match against Hantuchova. I'm focusing a lot more on my singles now. We had a great year in doubles last year and it gave me a lot of experience but I've been training in France at the Mouratoglou tennis academy the past few months and that's really helped."