Serbian prosecutors have insisted that the COVID-19 test results submitted to Australian officials by Novak Djokovic were valid.
The 20-time Grand Slam winner - who is unvaccinated - travelled to compete in the Australian Open with a medical exemption after testing positive for coronavirus on December 16.
However, photos of Djokovic taking part in public events after his positive test were subsequently leaked, and Immigration Minister Alex Hawke proceeded to cancel his visa for a second time due to his unvaccinated status.
A BBC report then emerged over discrepancies in Djokovic's COVID-19 tests, with the serial number/confirmation code on his positive test being higher than the one on his negative test from December 22.
However, the Belgrade Public Prosecutor's office has insisted that the results were not falsified, saying in a statement: "It was established that Novak Djokovic was tested multiple times and the... test results from December 16 and December 22 were valid."
In Djokovic's absence, Rafael Nadal won a record-breaking 21st Grand Slam title at the Australian Open, defeating Russia's Daniil Medvedev in a five-set final.
