| 1. Lig | 10/09/17 | Ümraniyespor | - | İstanbulspor AŞ | 1:0 | ||||
| 1. Lig | 13/08/18 | İstanbulspor AŞ | - | Afjet Afyonspor | 4:3 | ||||
| 1. Lig | 01/03/20 | İstanbulspor AŞ | - | Adanaspor | 1:0 |
| 1. Lig | 10/09/17 | Ümraniyespor | - | İstanbulspor AŞ | 1:0 | ||||
| 1. Lig | 13/08/18 | İstanbulspor AŞ | - | Afjet Afyonspor | 4:3 | ||||
| 1. Lig | 01/03/20 | İstanbulspor AŞ | - | Adanaspor | 1:0 |
| Mehmet Seyfettin Sedef | |
| Born: | 05.08.1987 |
| Place of birth: |
Kilis, 
Turkey |
| Nationality: |
Turkey
|
| Height: | 180 cm |
| Weight: | 73 kg |
| Position(s): | Centre Back Defensive Midfielder |
| size of shoe: | 43 |
| Foot: | both |