Here are some answers about both withdrawals:
Capriati, Kournikova Withdraw from Pan Pacific Open
LONDON - Top seed Jennifer Capriati and Anna Kournikova, seeded fifth, have withdrawn from next week's Pan Pacific Open in Japan.
Capriati, the American world number three, had sunspots removed from both eyes in mid-November and was beaten in the first round of the Australian Open. She admitted she had returned too early.
Russia's Kournikova lost in the second round of the Australian Open, handed her heaviest defeat in a grand slam tournament by Belgium's Justine Henin-Hardenne, and has pulled out of the Pan Pacific with a back sprain.
American Lindsay Davenport is likely to take over from Capriati as top seed with compatriot Monica Seles as the second seed.