Australia's Covid-19 border rules ban non-double vaccinated foreigners from entering Australia, unless they have a medical exemption from having the jabs.The court filing by lawyers for the Australian government also reveal Star Tennis Player Novak Djokovic, 34, is unvaccinated.
Djokovic's legal team argue a recent infection gives him a valid exemption.
Last week the Serbian Star tennis player flew into Melbourne , hoping to defend his Australian Open title.
But instead he has been held in an immigration detention center as his lawyers prepare to appeal against a decision by Australia's federal government to cancel his visa.
On Saturday, Djokovic's lawyers submitted a 35-page document arguing that their client fulfilled the criteria for a vaccine exemption certificate because of a recent Covid-19 infection, which was confirmed by a RT-PCR test on 16 December.
But in Sunday's court filing, lawyers for Australia's home office dismissed this as a valid reason.