By surface
| Surface | Hyeon Chung | Denis Istomin |
|---|---|---|
| Clay | 2 | 1 |
All meetings (3)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2017-05-29 | ATP | Roland Garros | Round of 64 | Clay | Hyeon Chung | 6-1 | 7-5 | 6-1 | ||
| 2017-04-24 | ATP | Barcelona | Round of 64 | Clay | Hyeon Chung | 6-4 | 6-4 | |||
| 2015-07-17 | ATP | Davis Cup G1 R2: UZB vs KOR | Round Robin | Clay | Denis Istomin | 1-6 | 0-1 |