Philippoussis was taken into custody at his home in the Mira Mar neighborhood of San Diego after investigators established probable cause to support sexual allegations made against him, Rylaarsdam said.
Rylaarsdam said that the investigation was still "in the infancy".
“Philippoussis works as a personal tennis coach in northern San Diego County and the alleged molestation victims took tennis lessons from him,” he said.
He remains in custody and authorities are seeking bail of .5 million, reports in Australia said.
The father of the Australian tennis player Mark Philippoussis has been arrested in the United States for allegedly molesting two children he was coaching, authorities said yesterday.
"The investigation is ongoing at this time." County Sheriff Bill Gore posted a Tweet just before 8am AEST calling for other alleged victims to come forward.
Mark Philippoussis, dubbed the Scud in his heyday, is an icon of Australian tennis who reached a peak of world number eight, won two Davis Cup titles and made the US Open and Wimbledon finals.
actress, 41, released her healthy eating and personal narrative memoir last month, and didn't hesitate to include scathing tidbits about an ex—seemingly her ex-husband, Bradley Cooper.
PHOTOS: Bradley's red carpet style Cooper, 39, and Esposito divorced in 2007 after just four months of marriage.