Ana Ivanovic cruised to victory over Tsvetana Pironkova 6-0, 6-2 in round-robin play at Tournament of Champions.
ALEXANDER KLEIN/AFP/Getty Images

SOFIA, Bulgaria (AP) -- Ana Ivanovic and Simona Halep cruised to straight-set victories on Tuesday in their opening round-robin matches at the season-ending Tournament of Champions.

Top-seeded Halep of Romania defeated Russia's Anastasia Pavlyuchenkova 6-3, 6-3 in the Serdika group, while Ivanovic beat Bulgaria's Tsvetana Pironkova 6-0, 6-2 in the Sredets group.

In Tuesday's third match, third-seeded Maria Kirilenko retired due to injury against France's Alize Cornet, and had to quit the tournament for a second consecutive year.

Cornet was leading 5-0 in the first when Kirilenko called for a medical time out, before later abandoning the competition.

Ukraine's Elina Svitolina will replace Kirilenko.

Copyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

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