Some of the proof that he faked his visa application is claiming he is vaccinated when he is not, and claiming he had not travelled in the week before boarding the plane when he had documented a trip to Spain while COVID-positive. The Spanish government is now investigating whether Novak Djokovic travelled to Spain illegally, so there’s more legal shenanigans waiting for him when he eventually gets home.
The reason none of this resulted in his visa being refused in the first place is that the Australian tennis folks are buddy-buddy with the Prime Minister’s folks, and the unofficial ministerial guidelines are that if there’s an event associated with government cronies then all stops are pulled.