Chung has a career high ATP singles ranking of No.
On the junior tour, Chung had a career-high combined ranking of 3 achieved on 21 March 2016.
Chung was a semifinalist at the 2016 Australian Open boys' singles event and the 2015 US Open boys' singles event where he fell to both eventual champions Oliver Anderson and Taylor Fritz, respectively.
He and Orlando Luz lost to Yishai Oliel of Israel and Patrik Rikl of the Czech Republic in the final of the 2016 French Open boys' doubles, 6–3, 6–4.
This biographical article relating to South Korean tennis is a stub.