The Fed Cup was supposed to be Lindsay Davenport's baby. It sure wasn't Saturday, when the veteran faltered badly in a stunning loss on the opening day of a quarterfinal against Germany. Playing in her native Southern California, Davenport didn't have much go her way in losing 6-1, 7-5 to 18-year-old Sabine Lisicki, who was coming off an impressive performance at the Australian Open.