officials from covid vaccination rules had prompted outrage among some australians. his lawyers said they would challenge the decision by the australian border force. mark lobel has the latest. the tennis men's world number one was defending his title before —— after being in fit. federal authorities noticed a mistake with his application. the serbian tennis star was quizzed in the room at melbourne airport for more than seven hours while his visa and exemption status was being investigated. he is now facing the prospect of boarding a plane and leaving australia. mr plane and leaving australia. m djokovic failed to provide appropriate evidence to meet the entry requirements to australia and visa has been subsequently cancelled. whether he wishes to appeal that, if a visa is cancelled, someone has to leave the country.- to leave the country. reacting