Former world number one Ashleigh Barty has fuelled speculation she may attempt a top-level career in a third sport by signing up to for a golf exhibition.
Manchester City boss Pep Guardiola and 23-time Olympic champion Michael Phelps are among the other stars taking part.
"It's such a unique opportunity to have fun, test yourself and compete," Barty told the Sydney Morning Herald.
"I hope through my participation in the series that we can encourage more women and girls to participate in golf around the world."
Barty, whose three Grand Slam singles titles include last summer's Wimbledon crown, is a keen amateur golfer with a reported handicap of four.