American Serena Williams pulled out due to left knee surgery.
American Venus Williams pulled out due to abdominal injury.

Toronto, Withdrawals:
#5 Venus Williams USA abdominal strain
#7 Jennifer Capriati USA shoulder
#9 Chanda Rubin USA r. shoulder tendinitis
#18 Patty Schnyder SUI wrist injury
#19 Meghann Shaughnessy USA back injury
#23 Anna Pistolesi ISR unknown
#29 Alexandra Stevenson USA r. shoulder strain