Henin, who was honored Thursday as the 2007 WTA Tour Player of the Year, coasted past Angelique Kerber 6-4, 6-2. Williams had no problems disposing of Edina Gallovits 6-1, 6-2, opening her bid to win the tournament for the fifth time in seven years.
Henin will next play Sara Errani.
Third-seeded Svetlana Kuznetsova advanced with a 6-1, 3-6, 6-3 victory over Yung-Jan Chan and No. 11 seed Patty Schnyder fought off Vania King 7-6 (10-8), 4-6, 6-2. Kuznetsova won this event two years ago and fell in the finals last week in Indian Wells to Ana Ivanovic.
Putin thinks Obama would save him if he were drowning
Members of Congress to keep receiving porn magazine