The youngest man in the draw had already claimed bragging rights with a stunning upset of No.4 seed and fellow young gun Alexander Zverev in a five-set third round.
This victory, over the former No.1 on a comeback from six months out of the game, was more emphatic.
The 7-6(4) 7-5 7-6(3) upset of his childhood idol pits him into the most unlikely of quarterfinal clashes with world No.97 Tennys Sandgren, who eliminated No.5 seed Dominic Thiem in five sets.
“I'm just happy to play with Novak again. I'm just honoured to see him again on the tour. Today my dreams come true.”
“I think I saw him [for the] first time when he make champion in Melbourne, in Australian Open, like almost 10 years ago,” Chung said of Djokovic. “When I’m young, I’m trying to copy Novak because he’s my idol.”
“Unfortunately, it's not great,” Djokovic said of his elbow. “Kind of end of the first set it started hurting more. So, yeah, I had to deal with it till the end of the match.”
