Djokovic, 34, has been held in an immigration detention hotel alongside long-term asylum seeker detainees since Thursday.
He was permitted to attend his lawyers' chambers for the virtual hearings but has not been seen in public since he arrived in Australia.
His lawyers argued that a recent Covid-19 infection qualified Djokovic for the medical exemption from a requirement for non-Australian citizens entering the country to be double vaccinated.
The Australian government, however, said non-citizens had no right of guaranteed entry to Australia, questioned his claimed exemption and stressed that even Djokovic wins the court action, it reserved the right to detain him again and remove him from the country.