Yeah, I'm only going on what's been reported, but it seems like Novak's team were trying to bullshit their way in to the comp while sidestepping vaccination.
* Was given approval by Tennis Australia for an exemption based on their rules, but didn't consult the Australian Government on entry in to the country. Their "exemption" was based on TA allowing a previous Covid infection (in the last 6 months) as a viable alternative to vaccination. However this is not a viable alternative under Australia's entry rules, and this was apparently made clear to Tennis Australia prior to Novak seeking entry.
* There doesn't seem to be any actual evidence of Novak having returned a positive test, though it may exist and just hasn't been presented yet. As stated above, at the time of the positive test, he went to numerous public events without any mask or protection. The disclaimer here though is that it is unclear whether the date stated is when the test was taken, or when the test results were known, etc.
* On top of that, there seems to have been a deadline for confirming entry in to the competition that Novak missed. The only way that players are able to confirm after that date is if there was an instance of Covid making them unable to confirm earlier. However the date of the deadline was earlier than when he supposedly had Covid, which is very convenient. This is why people are suggesting that the positive Covid test is fraudulent, as, without it, he would have missed the deadline with no other grounds to apply at a later date.