The squad is led by veteran goalkeeper Mat Ryan after a standout season with La Liga side Levante. He will be at his fourth FIFA World Cup, as will Melbourne City forward Mathew Leckie.

Seventeen players will be at the global showpiece for the first time.

"Some difficult decisions had to be made - that's the nature of major tournaments," said Popovic.

"But it's also a credit to all the players involved over the past few weeks who worked extremely hard during an extended and challenging pre-camp."

Volpato's bombshell late switch to Australia on Friday is a welcome boost after injured Middlesbrough midfielder Riley McGree was ruled out of the tournament.

Australia, who are at their sixth successive FIFA World Cup, are in Group D alongside Turkiye, co-hosts the United States and Paraguay.

They open their campaign against Turkiye in Vancouver on June 14.

Australia Squad:
Goalkeepers: Patrick Beach (Melbourne City/AUS), Paul Izzo (Randers FC/DEN), Mathew Ryan (Levante/ESP)

Defenders: Aziz Behich (Melbourne City/AUS), Jordan Bos (Feyenoord/NED), Cameron Burgess (Swansea City/ENG), Alessandro Circati (Parma/ITA), Milos Degenek (Apoel Nicosia/CYP), Jason Geria (Albirex Niigata/JPN), Lucas Herrington (Colorado Rapids/USA), Jacob Italiano (Grazer AK/AUT), Harry Souttar (Leicester/ENG), Kai Trewin (New York City/USA)

Midfielders: Cameron Devlin (Hearts/SCO), Ajdin Hrustic (Heracles Almelo/NED), Jackson Irvine (St Pauli/GER), Connor Metcalfe (St Pauli/GER), Aiden O'Neill (New York City/US), Paul Okon-Engstler (Sydney FC/AUS)

Forwards: Nestory Irankunda (Watford/ENG), Mathew Leckie (Melbourne City/AUS), Awer Mabil (Castellon/ESP), Mohamed Toure (Norwich/ENG), Nishan Velupillay (Melbourne Victory/AUS), Cristian Volpato (Sassuolo/ITA), Tete Yengi (Machida Zelvia/JPN)