Serbia's Jelena Jankovic has become the eighth and final player to qualify for the season-ending 4.55-million dollar WTA Championships in Doha.

Jankovic joins Dinara Safina, Serena Williams, Elena Dementieva, Caroline Wozniacki, Svetlana Kuznetsova, Venus Williams and Victoria Azarenka in the eight-player field at the tournament which starts on Tuesday.

Jankovic made sure of her place when Russia's Vera Zvonareva, her only remaining rival for the final place, lost in the second round of the Kremlin Cup here on Thursday.

Zvonareva and Poland?s Agnieszka Radwanska have been named as singles alternates and will also travel to Doha.

"I am really happy about making it to the WTA Championships for the third time in my career," said former world number one Jankovic.

"It is always a nice feeling to end the season playing in the Championships as one of the best eight players in the world. I?m looking forward to returning to Doha and playing some great matches."

The doubles competition in the Qatari capital features Cara Black and Liezel Huber, Venus and Serena Williams, Nuria Llagostera Vives and Maria Jose Martinez Sanchez and Rennae Stubbs and Samantha Stosur.