Career as a coach
| Period | Team | Country | Position | |
|---|---|---|---|---|
| 07/2024 - 03/2026 |  | Ghana |  Ghana | Manager |
| 02/2022 - 03/2022 | | Ghana | Ghana | Manager |
| 09/2021 - 12/2021 | | Ghana | Ghana | Ass. Coach |
| 01/2016 - 06/2017 |  | FC Nordsjælland |  Denmark | Ass. Coach |
| 07/2010 - 06/2015 |  | Hamburger SV U19 |  Germany | Manager |
| 09/2013 - 09/2013 |  | Hamburger SV | Germany | Ass. Coach |
| 01/2009 - 06/2010 | | Hamburger SV U19 | Germany | Ass. Coach |
National teams managed
| Season | Team | Position | |
|---|---|---|---|
| Friendlies 2026 | | Ghana | Manager |
| Friendlies 2025 | | Ghana | Manager |
| WC Qualifiers Africa 2023-2025 | | Ghana | Manager |
| Africa Cup Qual. 2024 | | Ghana | Manager |
| Friendlies 2024 | | Ghana | Manager |
| Africa Cup Qual. 2022-2023 | | Ghana | Manager |
| World Cup 2022 Qatar | | Ghana | Manager |
| Friendlies 2022 | | Ghana | Manager |
| WC Qualifiers Africa 2019-2021 | | Ghana | Manager |
| Friendlies 2021 | | Ghana | Ass. Coach |
Career as a player
| Period | Team | Country | Position | # | |
|---|---|---|---|---|---|
| 07/2007 - 06/2008 | | Hamburger SV | Germany | Midfield | 28 |
| 07/2007 - 06/2008 |  | Hamburger SV II | Germany | Midfield | |
| 07/2005 - 06/2007 |  | 1. FSV Mainz 05 | Germany | Midfield | 6 |
| 07/2004 - 06/2005 |  | Borussia Dortmund | Germany | Midfield | 11 |
| 05/2003 - 06/2005 |  | Borussia Dortmund II | Germany | Midfield | 29 |
| 07/1999 - 06/2004 | | Borussia Dortmund | Germany | Midfield | 19 |
| 07/1996 - 06/1999 |  | Hannover 96 | Germany | Midfield | 10 |
| 07/1993 - 06/1996 |  | VfL 93 Hamburg | Germany | Midfield | |
| 07/1992 - 06/1993 |  | Bramfelder SV | Germany | Midfield |
Club matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Champions League | 5 | 3 | 2 | 1 | 309 | 1 | - | - | 1 | - | - | » All matches |
| Champions League Qual. | 2 | 1 | 1 | - | 165 | - | - | - | 1 | - | - | » All matches |
| Europa League | 6 | 4 | 2 | 2 | 369 | 1 | - | - | 1 | - | - | » All matches |
| Europa League Qual. | 3 | - | 3 | - | 58 | - | - | - | - | - | - | » All matches |
| Bundesliga | 98 | 62 | 36 | 31 | 5.769 | 11 | - | 16 | 23 | - | - | » All matches |
| 2. Bundesliga | 30 | 30 | - | 8 | 2.462 | 7 | - | 1 | 8 | 1 | - | » All matches |
| DFB-Pokal | 16 | 13 | 3 | 5 | 1.195 | 4 | - | - | 1 | 1 | - | » All matches |
| Regionalliga Nord | 16 | 16 | - | 4 | 1.309 | - | - | - | 3 | - | - | » All matches |
| Promotion Round 2. Bundesliga | 4 | 4 | - | 1 | 294 | - | - | - | - | - | - | » All matches |
| League Cup | 5 | 1 | 4 | - | 116 | - | - | - | 1 | - | 1 | » All matches |
| Total | 185 | 134 | 51 | 52 | 12.046 | 24 | - | - | 39 | 2 | 1 |
International matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | World Cup | 2 | 1 | 1 | 1 | 91 | - | - | - | 1 | - | - | » All matches |
| Friendlies | 4 | 3 | 1 | 2 | 143 | - | - | - | - | - | - | » All matches |
 | Africa Cup | 4 | 4 | - | 4 | 279 | 1 | - | - | - | - | - | » All matches |
| Total | 10 | 8 | 2 | 7 | 513 | 1 | - | - | 1 | - | - |