Several matches were delayed by rain in the first day of the year's third Grand Slam tennis event. The start of the Hingis match was delayed 2 1/2 hours by rain.
Hingis, seeded ninth, rallied for a 6-7 (1-7), 7-5, 6-0 win over Naomi Cavaday to earn a second-round match against Aiko Nakamura.
Henin, the No. 1-ranked player in the world, roared past Jorgelina Cravero 6-3, 6-0 and Williams, seeded seventh at Wimbledon, beat Lourdes Dominguez Lino 7-5, 6-0. Henin won this year's French Open and Williams claimed the 2007 Australian Open.
Also Monday, No. 15 Patty Schnyder defeated Camille Pin 6-1, 4-6, 8-6; 16th-seeded Shahar Peer was a 7-5, 6-2, winner over Tamarine Tanasugarn; No. 20 Sybille Bammer ran past Varvara Lepchenko 6-2, 6-2; and 25th-seeded Lucia Safarova beat Zuzana Ondraskova 7-5, 6-2.