Here's what Reilly Opelka told Novak Djokovic at the net after his stunning upset win vs. the World No. 7 at the Brisbane International.

Djokovic is in search of his 25th Grand Slam title at the Australian Open, but fell short of the semifinals at his warm-up event.

Reilly Opelka kept it straight honest following his shock win over Novak Djokovic, admitting that he played freely and didn't feel any pressure because he was playing "the greatest player of all time" and didn't have any expectations.

Recap, quotes, and highlights from Reilly Opelka's upset victory over Novak Djokovic in the Brisbane International.

Novak Djokovic was beaten 7-6 (6), 6-3 by big-serving Reilly Opelka in the Brisbane International quarterfinals.

The 24-time Grand Slam champion lost fairly handily to 6-foot-11 American Reilly Opelka, 7-6 (6), 6-3, in the quarterfinals at Brisbane. It was the first top-10 win since 2021 for the 27-year-old Opelka, who hasn’t played a full season since 2022 due to injury.

Novak Djokovic will not play any further part in this year's Brisbane International as Reilly Opelka has sealed the biggest win yet of his return to the sport after having most of the last 18 months on the sidelines injured.

Reilly Opelka secured the biggest win of his comeback over Novak Djokovic in the Brisbane International quarterfinals.

Novak Djokovic's hunt for a landmark 100th ATP title ended with a whimper following an unexpected 7-6(6) 6-3 defeat by big-serving American Reilly Opelka in the Brisbane International quarter-finals on Friday.