Stosur, Keys, Bouchard, Nara in Japan Open semis

The Associated Press
Samantha Stosur of Australia returns a shot against Lucie Safarova of the Czech Republic during their third round match of the Pan Pacific Open tennis tournament in Tokyo, Wednesday, Sept. 25, 2013. (AP Photo/Shizuo Kambayashi)

Stosur, Kuznertsova advance at Kremlin Cup

Samantha Stosur of Australia returns a shot against Lucie Safarova of the Czech Republic during their third round match of the Pan Pacific Open tennis tournament in Tokyo, Wednesday, Sept. 25, 2013. (AP Photo/Shizuo Kambayashi)

OSAKA, Japan (AP) -- Former champion Samantha Stosur reached the Japan Open semifinals, beating Misaki Doi of Japan 6-1, 3-6, 6-3 on Friday.

Awaiting the third-seeded Stosur on Saturday is American teenager Madison Keys, who advanced to her first WTA semifinals with a 6-3, 6-1 victory over China's Zheng Jie. In the other semi, Canada's Eugenie Bouchard faces Japan's Kurumi Nara.

Stosur, who won the title in 2009, raced ahead 5-0 in the opening set, but Doi rallied to rouse the home crowd and take the second set. The pair exchanged service breaks in the third before Stosur held on to win.

Bouchard beat Barbora Zahlavova Strycova of the Czech Republic 2-6, 6-4, 6-1 in their quarterfinal while Nara defeated Polona Hercog of Slovenia 7-6 (4), 2-6, 6-1.

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