Kim Clijsters, defeated Francesca Schiavone in two sets, 6-3, 7-6, but announced her withdrawal from the Unicef Open on Friday because of a strained stomach muscle. (AP Photo/Peter Dejong)

Photo by: Peter Dejong

Kim Clijsters, defeated Francesca Schiavone in two sets, 6-3, 7-6, but announced her withdrawal from the Unicef Open on Friday because of a strained stomach muscle. (AP Photo/Peter Dejong)