DOHA, Qatar - Jelena Jankovic booked her spot in the semifinals of the Sony Ericsson Championships - Doha 2009 Friday, beating Caroline Wozniacki to improve her group record to 2-1. 
Highlights: Jankovic vs. Wozniacki
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Jankovic, the No.8 seed, made quick work of a visibly exhausted Wozniacki, needing just 68 minutes to win, 62 62. While Jankovic looked fresh and in tune, hitting 17 winners to 19 errors, the No.4-seeded Wozniacki hit seven winners to 22 errors, including two wild groundstroke misses on the last two points.
"I didn't know what to expect from Caroline today. I watched her play yesterday and saw what happened," Jankovic said. "I just knew I had to win this one. I wanted to play aggressively and dictate points, and not get into the long points, which I know she's really good at." Interview: Jelena Jankovic
A day earlier, Wozniacki overcame cramping to outlast Vera Zvonareva in three sets; the day before that, she beat Victoria Azarenka in three sets.
"I didn't have anything left. I couldn't play like I wanted to," the Dane said. "I definitely feel like I deserve to make it to the semis, but I did everything I could, and I fought the best I could. If I don't get there, it's just bad luck. It's the way it's supposed to be. I still have many more years in front of me."
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The other semifinal berth in the White Group comes down to the third match on Friday, as Azarenka plays alternate Agnieszka Radwanska. If Azarenka wins, she claims the second semifinal berth; if Radwanska wins, Wozniacki gets it.
"I hope Radwanska wins because if she does I'll get through," joked Wozniacki, who is good friends with both Azarenka and Radwanska. "For sure, I'm going to be cheering for her! All three of us are friends. Usually I wouldn't cheer for either of them, but in this situation, I think it's normal I'll cheer for Agnieszka!"
