| US Open | 08/28 15:00 | 23 | [104] Ricardas Berankis v Hyeon Chung [23] | Retired | |
| ATP Winston-Salem | 08/23 20:25 | 27 | [23] Hyeon Chung v Pablo Carreno-Busta [12] | 3-6,4-6 | |
| ATP Winston-Salem | 08/22 20:45 | 26 | [23] Hyeon Chung v Matteo Berrettini [60] | 6-3,3-6,6-3 | |
| ATP Winston-Salem | 08/21 00:30 | 25 | [23] Hyeon Chung v Guillermo Garcia-Lopez [69] | 7-6,6-2 | |
| ATP Cincinnati | 08/16 19:00 | 25 | [25] Hyeon Chung v Juan M Del Potro [3] | 2-6,3-6 | |
| ATP Cincinnati | 08/14 15:00 | 24 | [25] Hyeon Chung v Jack Sock [20] | 2-6,6-1,6-2 | |
| ATP Toronto | 08/07 17:00 | - | Hyeon Chung v Novak Djokovic | Cancelled | |
| ATP Washington | 08/03 02:55 | 26 | [23] Hyeon Chung v Alex De Minaur [72] | 2-6,6-4,2-6 | |
| ATP Washington | 08/01 22:15 | 25 | [23] Hyeon Chung v Marcos Baghdatis [91] | 6-7,6-4,6-3 | |
| ATP Atlanta | 07/27 20:00 | 27 | [53] Ryan Harrison v Hyeon Chung [23] | 6-7,6-2,7-6 | |
| ATP Atlanta | 07/25 15:00 | 26 | [65] Taylor Fritz v Hyeon Chung [23] | 4-6,6-7 | |
| ATP Lyon | 05/23 16:00 | - | Gilles Simon v Hyeon Chung | Cancelled | |
| ATP Madrid | 05/08 10:00 | 24 | [44] Robin Haase v Hyeon Chung [21] | 6-2,6-0 | |
| ATP München | 05/05 11:30 | 28 | [3] Alexander Zverev v Hyeon Chung [22] | 7-5,6-2 | |
| ATP München | 05/04 09:00 | 27 | [22] Hyeon Chung v Martin Klizan [122] | 6-3,6-4 | |
| ATP München | 05/02 13:20 | 26 | [22] Hyeon Chung v Matthias Bachinger [163] | 6-1,6-1 | |
| ATP Barcelona | 04/25 15:55 | 25 | Hyeon Chung v Bjorn Fratangelo | Cancelled | |
| ATP Miami | 03/28 19:00 | 27 | [23] Hyeon Chung v John Isner [17] | 1-6,4-6 | |
| ATP Miami | 03/27 15:00 | 26 | [80] Joao Sousa v Hyeon Chung [23] | 4-6,3-6 | |
| ATP Miami | 03/25 15:00 | 25 | [23] Hyeon Chung v Michael Mmoh [176] | 6-1,6-1 | |
| ATP Miami | 03/23 20:20 | 24 | [23] Hyeon Chung v Matthew Ebden [76] | 6-3,7-5 | |
| ATP Indian Wells | 03/16 02:00 | 27 | Roger Federer v Hyeon Chung | 7-5,6-1 | |
| ATP Indian Wells | 03/14 18:00 | 26 | Hyeon Chung v Pablo Cuevas | 6-1,6-3 | |
| ATP Indian Wells | 03/13 04:00 | 25 | Tomas Berdych v Hyeon Chung | 4-6,4-6 | |
| ATP Indian Wells | 03/11 01:55 | 24 | Dusan Lajovic v Hyeon Chung | 7-6,3-6,3-6 | |
| ATP Acapulco | 03/02 01:00 | 27 | Hyeon Chung v Kevin Anderson | 6-7,4-6 | |
| ATP Acapulco | 02/28 22:00 | 26 | Ernesto Escobedo v Hyeon Chung | 3-6,1-6 | |
| ATP Acapulco | 02/27 23:40 | 25 | Hyeon Chung v Donald Young | 7-6,6-1 | |
| ATP Delray Beach | 02/24 01:00 | 27 | Hyeon Chung v Frances Tiafoe | 7-5,4-6,4-6 | |
| ATP Delray Beach | 02/22 23:35 | 26 | Hyeon Chung v Franko Skugor | 6-4,7-6 |