Top seed Zvonareva crushed in Moscow

Bulgarian qualifier Tsvetana Pironkova crushed top seed Vera Zvonareva [ Images ] 6-0, 6-2 in the second round of the Kremlin Cup on Thursday, eliminating the Russian from the season-ending tournament in Doha.

Defeat for the world number seven enabled Serbia's Jelena Jankovic [ Images ] to clinch the last remaining spot in next week's $4.55 million WTA championships regardless of her own progress in Moscow [ Images ].

Poland's third seed Agnieszka Radwanska [ Images ], who also had a shot at qualifying for Doha at the start of the week, saw her chances disappear after a first-round defeat by Russia's [ Images ] Maria Kirilenko on Wednesday.

Zvonareva's loss continued the cull of seeds at the annual indoor tournament, celebrating its 20th anniversary this year.

Men's top seed, Nikolay Davydenko [ Images ] was also sent packing by fellow Russian Marat Safin [ Images ] in the first round on Wednesday.

For world number 126 Pironkova it was only her fourth win of the year on the main tour and the first since April.

The 22-year-old will now contest her first quarter-final of the season, where she will meet Ukraine's Alona Bondarenko who knocked out Russia's fifth seed Nadia Petrova [ Images ] on Wednesday.