Speculation is mounting that Steffi Graf is pregnant.
The German, who is engaged to fellow tennis star Andre Agassi, has what looks like the start of a baby bulge.
The couple have often said they want children.
Photos of Graf in Sydney with Agassi at the Australian Open have been re-examined in the light of the rumours.
One friend has been quoted saying Graf became pregnant at the end of November.
Agassi told a magazine last summer: "We want a lot of children and are working hard on it. Steffi can hardly wait to become the mother of my children."
The German magazine Bunte has recently quoted friends saying the pair, who are preparing to move into a 22-room villa near San Francisco, intend to marry this summer.