Hyeon Chung, ranked number 58 in the world, beats former world number 1 Novak Djokovic in straight sets 7-6, 7-5, 7-6 .
Djokovic, a former six time winner at Melbourne, was blown away by the 21-year-old South Korean.
Chung played utterly fearless tennis, knocking out fellow ‘Next Genner’ Alexander Zverev in five sets in round 3.
There were doubts over the Serb’s fitness going into the tournament, but he has been clinical in his first few matches and dropped just one set along the way.