TOKYO, Jan. 30 (UPI) -- Fifth-seeded Ana Ivanovic and No. 6 Na Li posted first-round victories Tuesday at the $1.34 million Pan Pacific Open tennis tournament in Tokyo.
Both seeded players won in solid straight-set showings over U.S. players. Ivanovic ousted Shenay Perry 6-4, 6-2 and Li took out Lilia Osterloh, 6-3, 6-2.
Eighth-seeded Daniela Hantuchova was first-round upset victim, falling 6-4, 6-4 to Robert Vinci.
The tournament top four seeded players -- No. 1 Maria Sharapova, second-seeded Martina Hingis, third-seeded Elena Dementieva and Jelena Jankovic -- were given first-round byes. Dementieva is the tournament's defending champion.