TOKYO (AP) -- Ninth-ranked Agnieszka Radwanska of Poland coasted to a 6-1, 6-1 win over Japanese wild card Misaki Doi on Sunday in the first round of the Pan Pacific Open.
After struggling with her serve in the first set, Radwanska won 10 out of 10 points on her first serve in the second set to close out the match in 1 hour, 5 minutes at Ariake Colosseum.
Defending champion Caroline Wozniacki of Denmark, the top-seeded player in the $2 million tournament, has a first-round bye as does second-seeded Maria Sharapova of Russia.
In other first-round matches, 11th-seeded Anastasia Pavlyuchenkova of Russia beat Arantxa Rus of the Netherlands 6-4, 6-3.
Japan's Ayumi Morita advanced to the second round with a 7-5, 6-1 win over Irina Falconi of the United States. Thailand's Tamarine Tanasugarn opened with a 6-4, 6-4 win over Petra Cetkovska of the Czech Republic.