8 of 16 seeds advance on Day 1 at Tokyo

As the first day of the Toray Pan Pacific Open took place, sixteen tennis stars took the courts on Tuesday, with 8 of them reserving a spot in the second round.

Agnieszka Radwanska, seeded 6th, made a good start in her first round match, defeating Aiko Nakamura, 61 64.

A wave of matches between unseeded players followed Radwanska's win. Marion Bartoli dispatched Maria Kirilenko, 62 62; Flavia Pennetta beat Shahar Peer, 64 64; Alizé Cornet outlasted Aleksandra Wozniak, 46 63 63; Dominika Cibulkova won a nail-biter against Amélie Mauresmo, saving match points in the third set to beat the former No.1, 06 61 76(8); and Japanese youngster Ayumi Morita won a nail-biter herself, fighting back to beat Agnes Szavay, 67(7) 75 64.

Anna Chakvetadze, who is seeded eighth, didn't pass her first round test, as she fell in a three-setter to Kaia Kanepi, 64 36 63.

There could be a change to the rankings this week. Since No. 1 Serena Williams isn't playing this week, Jelena Jankovic the No. 2 in the world could have a chance at being No. 1 again, that is if she wins the tournament.

Ana Ivanovic, Elena Dementieva, Dinara Safina and Svetlana Kuznetsova are the No.2 through No. 5 seeds. Ivanovic, Dementieva and Safina all received first round byes as well; Kuznetsova will play Li Na in the first round on Wednesday.