'Australia are the underdogs and we love that," Arnold said. "We love the backs to the wall, and no one giving us a chance, and going out there and fighting the odds, the Aussie spirit way. That's our strength.'
Reports added that the 47-year-old, who is part of the Seven Network's commentary team for Australia's two-Test home series against the West Indies, told colleagues he was feeling alright but went to hospital as a precaution.
Australia, ranked 35 places below Argentina, have already surpassed expectations in winning twice to earn their place at Qatar's Ahmad bin Ali Stadium this weekend for one of the biggest games in their history.
Australia scored on the counter in the 60th minute when Leckie got past the Danish defence and twisted into space before slotting the ball home.
The coach sacked by Kerala Blasters is now finding success with the Socceroos.
Felix Auger-Aliassime beat Alex de Minaur 6-3, 6-4 to give them an unassailable 2-0 lead over Australia in the final.
The 31-year-old reeled away in celebration holding up his hands in the shape of the letter 'J' for his son Jaxson as his teammates embraced him near the corner flag.
Duk scored from a counter-attack when he got on the end of Craig Goodwin's cross and directed a glancing header past the goalkeeper.
The pact is expected to come into force from January 2023. The agreement, which was signed on April 2, would provide duty-free access to Indian exporters of over 6,000 broad sectors.
Olivier Giroud netted twice to become France's joint record scorer as they fought back to put Australia to the sword.