CINCINNATI, OH, USA - Having saved four match points to get out of their round of 16 match, Gisela Dulko and Flavia Pennetta had a far cleaner day at the office on Quarterfinal Friday, moving past Cara Black and Anastasia Rodionova in a straight-setter on a hot day in Cincinnati, 64 64.

Dulko and Pennetta, four-time Sony Ericsson WTA Tour doubles titlists this year together and the No.2 seeds here, broke the Rodionova serve in the first game of each set and never really looked back each time, reaching their seventh semifinal of 2010 with the handy win over the No.8 seeds.

Earlier, Victoria Azarenka and Maria Kirilenko continued to rebound from dramatic singles losses with another win in the doubles, saving set point down 5-4 in the second set to beat Sania Mirza and Monica Niculescu. Azarenka lost to Ana Ivanovic in the first round after being 62 53 up; Kirilenko lost to Vera Zvonareva in the second round after leading 5-2 in the third set.

At night, No.1 seeds Liezel Huber and Nadia Petrova made it past No.7 seeds and recent Stanford finalists Chan Yung-Jan and Zheng Jie, 62 64.

"Nadia and I played one of the toughest teams," Huber said. "We played smart and had a lot of fun. We are very excited to reach another semifinal together."

"It was quite an exciting match with a lot of tight rallies - we enjoyed it very much," Petrova said. "Pretty much everyone stayed from the singles match so I hope they enjoyed it. We were playing pretty confidently from the beginning until the end. Things got closer at the end but we were able to close it out."

No.4 seeds Lisa Raymond and Rennae Stubbs reached the semis with a 63 61 win over wildcards Carly and Chelsea Gullickson on Wednesday night.

Huber and Petrova will face Raymond and Stubbs in the semifinals.

"It will be an interesting match," Petrova said. "They're very experienced and we'll have to leave everything out there. They'll be tough. Anything can happen."

Petrova also commented on the many improvements made to the facilities for players and fans alike at the tournament: "They've made things so comfortable for everyone and it makes us all look forward to coming back next year. I'm also looking forward to the combined event next year."