Maria Kirilenko of Russia upset third-seeded Agnieszka Radwanska of Poland 6-3, 6-3 Wednesday in the first round of the Kremlin Cup.
The result means only two players — Jelena Jankovic of Serbia and Vera Zvonareva of Russia — remain in contention for the last spot for next week’s season-ending WTA Championships in Doha. Jankovic is five points ahead of Zvonareva in the battle for a berth. Both players advanced Tuesday to the second round.
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Kirilenko, ranked 61st, opened with a break and saved four break points in the eighth game. The 10th-ranked Radwanska then dropped serve again to lose the first set, and called for a trainer afterward to treat her right thigh.
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