| Singapore Open MD | 07/13 09:05 | 5 | Junaidi Arif/Haikal v Koh/Kubo | L | 2-1 | |
| Singapore Open 2019, MD, Qualification | 07/12 03:20 | - | Koh/Kubo v Ravikrishna/Sankar Prasad Udayakumar | - | Walkover | |
| Denmark Masters MD Qual | 06/09 16:40 | - | Lindeman/Lee v Koh/Kubo | W | 1-2 | |
| Italian Int. MD | 06/03 14:30 | - | Koh/Kubo v Chen/Lee | L | 0-2 | |
| Italian Int. MD Qual | 06/02 15:25 | - | Koh/Kubo v Geiss/Hess | W | 2-1 | |
| Thomas Cup MD | 05/09 13:00 | - | Choi S / Kim W H v Koh/Kubo | L | 2-0 | |
| Dutch Int. MD | 04/15 07:50 | - | Koh/Kubo v Law C H / Lee C H R | L | 0-2 | |
| Dutch Int. MD | 04/14 11:20 | - | Koh/Kubo v Apiliga J / Smith C | W | 2-0 | |
| Dutch Int. MD | 04/14 07:40 | - | Koh/Kubo v Kaisti/Qowimuramadhoni | W | 2-0 | |
| Estonian Int. MD | 01/15 09:20 | - | Koh/Kubo v Oupthong/Sothon | L | 0-2 | |
| Estonian Int. MD | 01/14 13:20 | - | Corvee/Gaudin v Koh/Kubo | W | 0-2 | |
| Estonian Int. MD | 01/14 13:00 | - | Koh/Kubo v 키비누름 K / 루킨 V | W | 2-0 |