 Japan: Kyoto - Singles - Main |
|---|
| 1/8-finals | Hasegawa R. | Koga A. | 2:1 (3:6, 6:3, 7:6) | details | 12.09.2012 |
| 1/16-finals | Kinoshita M. | Koga A. | 1:2 (0:6, 6:4, 3:6) | details | 11.09.2012 |
 South Korea: Yeong Wol - Singles - Main |
|---|
| 1/16-finals | Kim S. | Koga A. | 2:0 (6:2, 6:1) | details | 29.08.2012 |
 USA: Fort Worth - Singles - Main |
|---|
| 1/16-finals | Harkins M. | Koga A. | 2:0 (6:3, 6:4) | details | 31.07.2012 |
 Turkey: Antalya-Belconti - Singles - Qualification |
|---|
| Final | Koga A. | Milosavljevic P. | 0:2 (2:6, 3:6) | details | 10.04.2012 |
| Semi-finals | Koga A. | Sweeting W. . | 2:0 (6:3, 6:3) | details | 09.04.2012 |
| Japan: Miyazaki - Singles - Main |
|---|
| Quarter-finals | Miyazaki Y. | Koga A. | 2:1 (7:5, 5:7, 7:5) | details | 17.03.2012 |
| 1/8-finals | Araki S. | Koga A. | 0:2 (5:7, 2:6) | details | 15.03.2012 |
| 1/16-finals | Koga A. | Juan T.-F. | 2:0 (6:2, 6:2) | details | 14.03.2012 |
 Portugal: Portimao - Singles - Main |
|---|
| Quarter-finals | Parrizas-Diaz N. | Koga A. | RET. | details | 17.02.2012 |
| 1/8-finals | Dominguez-Lopez P. | Koga A. | 0:2 (4:6, 3:6) | details | 16.02.2012 |
| 1/16-finals | Koga A. | Sanduska P. | 2:1 (6:2, 1:6, 6:3) | details | 15.02.2012 |
| Portugal: Vale Do Lobo - Singles - Main |
|---|
| Quarter-finals | Koga A. | Malikova T. | 0:2 (0:6, 0:6) | details | 10.02.2012 |
| 1/8-finals | Parrizas-Diaz N. | Koga A. | 0:2 (3:6, 0:6) | details | 09.02.2012 |
| 1/16-finals | Koga A. | Tour E. | 2:1 (6:2, 3:6, 6:4) | details | 08.02.2012 |
 India: W25 Pune - Singles - Main |
|---|
| 1/16-finals | Prislan A. | Koga A. | 2:0 (6:3, 6:3) | details | 13.12.2011 |
