Career as a coach
| Period | Team | Country | Position | |
|---|---|---|---|---|
| 07/2021 - 06/2022 |  | VfL Wolfsburg |  Germany | Ass. Coach |
| 02/2018 - 11/2018 |  | 1. FC Kaiserslautern | Germany | Manager |
| 04/2015 - 12/2015 |  | Hannover 96 | Germany | Manager |
| 10/2012 - 11/2013 |  | FC St. Pauli | Germany | Manager |
| 07/2009 - 02/2011 |  | Bor. Mönchengladbach | Germany | Manager |
| 12/2007 - 05/2009 |  | Arminia Bielefeld | Germany | Manager |
| 09/2006 - 05/2007 |  | Alemannia Aachen | Germany | Manager |
| 03/2004 - 11/2005 | | Hannover 96 | Germany | Ass. Coach |
| 07/2000 - 09/2003 | | Bor. Mönchengladbach | Germany | Ass. Coach |
Career as a player
| Period | Team | Country | Position | # | |
|---|---|---|---|---|---|
| 01/1999 - 06/2000 | | Bor. Mönchengladbach | Germany | Defence | 19 |
| 07/1997 - 01/1999 |  | SC Freiburg | Germany | Defence | |
| 01/1997 - 06/1997 | | SC Freiburg | Germany | Defence | 35 |
| 01/1996 - 01/1997 |  | Manchester City |  England | Defence | 3 |
| 07/1995 - 01/1996 | | Bor. Mönchengladbach | Germany | Defence | |
| 07/1994 - 06/1995 |  | VfL Bochum | Germany | Defence | |
| 07/1989 - 06/1994 |  | VfB Stuttgart | Germany | Defence | |
| 07/1982 - 06/1989 | | Bor. Mönchengladbach | Germany | Defence |
Club matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Champions League | 3 | 3 | - | - | 180 | - | - | - | 1 | - | - | » All matches |
| Europa League | 32 | 30 | 2 | 1 | 2.776 | 1 | - | - | - | - | - | » All matches |
| Cup Winners Cup | 3 | 1 | 2 | - | 112 | - | - | - | 1 | - | - | » All matches |
| Bundesliga | 436 | 414 | 22 | 31 | 36.809 | 37 | 3 | 41 | 72 | - | 2 | » All matches |
| 2. Bundesliga | 54 | 54 | - | 12 | 4.490 | 2 | - | 2 | 9 | - | - | » All matches |
| DFB-Pokal | 40 | 38 | 2 | 2 | 3.810 | 1 | - | - | 7 | - | - | » All matches |
| Franz-Beckenbauer-Supercup | 1 | 1 | - | - | 90 | - | - | - | - | - | - | » All matches |
| Premier League | 12 | 11 | 1 | 7 | 833 | - | - | - | 2 | - | 1 | » All matches |
| Championship | 11 | 8 | 3 | 4 | 724 | - | - | - | 1 | 1 | - | » All matches |
| FA Cup | 1 | 1 | - | - | 90 | - | - | - | - | - | - | » All matches |
| League Cup | 1 | 1 | - | 1 | 46 | - | - | - | - | - | - | » All matches |
| Total | 594 | 562 | 32 | 58 | 49.960 | 41 | 3 | - | 93 | 1 | 3 |
International matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WC Qualifiers Europe | 3 | 2 | 1 | - | 225 | - | - | - | - | - | - | » All matches |
| Friendlies | 15 | 12 | 3 | 3 | 1.130 | - | - | - | - | - | - | » All matches |
| EURO | 1 | 1 | - | - | 90 | - | - | - | - | - | - | » All matches |
| Total | 19 | 15 | 4 | 3 | 1.445 | - | - | - | - | - | - | ||
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
| U21 Friendlies | 5 | 5 | - | 1 | 424 | - | - | - | - | - | - | » All matches |
| U21 EURO Qualifiers | 1 | 1 | - | - | 90 | - | - | - | - | - | - | » All matches |
| Total | 6 | 6 | - | 1 | 514 | - | - | - | - | - | - |