Channel 7 newsreaders

Novak Djokovic: Newsreaders caught in expletive-laden rant

It shows Channel 7 journalists Mike Amor and Rebecca Maddern talking candidly about the tennis star as they prepare to read Tuesday's evening news.

Maddern says Djokovic is "lying" and "sneaky", while Amor says the athlete has "fallen over his own... lies".

Channel 7 has launched an investigation into the "illegal" leak.