| Korea Masters 2019, MS, Qualification | 11/07 01:20 | 4 | Heo, Kwang Hee v Geonyeop Cho | L | 0-2 | |
| Masters de Thaïlande | 02/02 07:20 | 4 | Heo, Kwang Hee v Tze Yong Ng | L | 0-2 | |
| Masters de Thaïlande | 02/01 06:40 | 5 | Priyanshu Rajawat v Heo, Kwang Hee | W | 1-2 | |
| Australian Open | 11/17 03:00 | 4 | Tze Yong Ng v Heo, Kwang Hee | L | 2-1 | |
| Australian Open | 11/16 00:20 | 5 | Yan, Peter v Heo, Kwang Hee | W | 0-2 | |
| Japan Open | 08/30 01:35 | - | Leverdez, Brice v Heo, Kwang Hee | L | 2-1 | |
| World Championships | 08/22 03:20 | 6 | Heo, Kwang Hee v Ng, Ka Long Angus | L | 0-2 | |
| Malaysia Masters | 07/06 04:40 | 5 | Mark Caljouw v Heo, Kwang Hee | L | 2-0 | |
| Open de Malaisie | 06/29 03:20 | 5 | Heo, Kwang Hee v Parupalli, Kashyap | L | 0-2 | |
| Indonesia Open | 06/14 02:40 | 5 | Kean Yew Loh v Heo, Kwang Hee | L | 2-0 | |
| Indonesia Masters | 06/09 03:00 | - | Guang Zu Lu v Heo, Kwang Hee | L | 2-0 | |
| Indonesia Masters | 06/08 03:00 | - | Heo, Kwang Hee v Anders Antonsen | - | Walkover | |
| Thailand Open | 05/18 02:20 | 5 | Viktor Axelsen v Heo, Kwang Hee | L | 2-0 | |
| Thomas Cup | 05/12 12:00 | - | Heo, Kwang Hee v Viktor Axelsen | L | 1-2 | |
| Thomas Cup | 05/11 07:00 | - | Anthony Sinisuka Ginting v Heo, Kwang Hee | W | 1-2 | |
| Thomas Cup | 05/09 12:00 | - | Heo, Kwang Hee v Kean Yew Loh | L | 0-2 | |
| Thomas Cup | 05/08 12:00 | - | Heo, Kwang Hee v Kunlavut Vitidsarn | L | 0-2 | |
| Asia Championships | 04/27 04:20 | 5 | Heo, Kwang Hee v Liew, Daren | L | 1-2 | |
| Korea Masters | 04/14 03:20 | - | Heo, Kwang Hee v Joo Ven Soong | L | 0-2 | |
| Korea Masters | 04/12 04:00 | 5 | Heo, Kwang Hee v Chirag Sen | - | Walkover | |
| Korea Open | 04/05 03:50 | 5 | Hong Yang Weng v Heo, Kwang Hee | L | 2-0 | |
| Open d'Angleterre | 03/17 15:00 | 4 | Heo, Kwang Hee v Kento Momota | L | 0-2 | |
| Open d'Angleterre | 03/16 21:10 | 5 | Cheuk Yiu Lee v Heo, Kwang Hee | W | 1-2 | |
| German Open | 03/10 12:25 | 4 | Jun Peng Zhao v Heo, Kwang Hee | L | 2-0 | |
| German Open | 03/09 11:30 | 5 | Heo, Kwang Hee v Kalle Koljonen | W | 2-1 | |
| World Championships | 12/12 08:00 | 6 | Heo, Kwang Hee v Kai Schaefer | - | Walkover | |
| Indonesia Masters | 11/16 10:10 | 5 | Toma Junior Popov v Heo, Kwang Hee | L | 2-0 | |
| Open de France | 10/30 09:00 | - | Tien Chen Chou v Heo, Kwang Hee | L | 2-0 | |
| Open de France | 10/29 12:30 | 3 | Lakshya Sen v Heo, Kwang Hee | W | 0-2 | |
| Open de France | 10/28 14:40 | - | Tzu Wei Wang v Heo, Kwang Hee | W | 0-2 |