James O'Connor will practice with the Wallabies ahead of their Rugby Championship opener against South Africa, although he is yet to sign with an Australian club on his return from England.
The 44-Test veteran was due to fly out Monday to join the Australian squad in South Africa as they prepare for the match against the Springboks on July 21, live on Sky Sports.
Rugby Australia said the 29-year-old utility back would join the squad on a "train-only" basis.
O'Connor was called on after winger Marika Koroibete was allowed to remain in Australia, awaiting the birth of his second child.
Sale Sharks released O'Connor from his three-year contract so he could return to Australia and fight for a place in their World Cup squad.
He won the last of his 44 Wallabies caps in 2013, and having signed a contract with Rugby Australia, will reportedly play for the Reds in Super Rugby next season.
Know more: http://v.duta.us/93qqdAAA