Career as a player
| Period | Team | Country | Position | # | |
|---|---|---|---|---|---|
| 07/2019 - 08/2020 |  | Western Sydney Wanderers |  Australia | Midfield | 19 |
| 07/2017 - 06/2019 |  | Hannover 96 |  Germany | Midfield | 27 |
| 07/2014 - 06/2017 |  | TSG Hoffenheim | Germany | Midfield | 16 |
| 07/2009 - 06/2014 |  | Eintracht Frankfurt | Germany | Midfield | 27 |
| 07/2006 - 06/2009 |  | Bayer Leverkusen | Germany | Midfield | 16 |
| 12/2006 - 06/2008 |  | Bayer Leverkusen II | Germany | Midfield | |
| 07/2005 - 06/2006 |  | BSC Young Boys |  Switzerland | Midfield | 20 |
| 07/2003 - 06/2005 |  | FC Luzern | Switzerland | Midfield | 16 |
Club matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Europa League | 13 | 6 | 7 | 1 | 691 | - | - | - | 4 | - | - | » All matches |
| Europa League Qual. | 1 | 1 | - | 1 | 63 | - | - | - | - | - | - | » All matches |
| UI-Cup | 4 | 4 | - | 2 | 299 | - | - | - | 1 | - | - | » All matches |
| Bundesliga | 262 | 217 | 45 | 65 | 19.249 | 7 | 1 | 24 | 58 | 1 | - | » All matches |
| 2. Bundesliga | 27 | 27 | - | 4 | 2.341 | - | - | 5 | 5 | - | - | » All matches |
| DFB-Pokal | 22 | 18 | 4 | 7 | 1.506 | 1 | - | 5 | 2 | - | 1 | » All matches |
| Regionalliga Nord | 2 | 2 | - | - | 180 | - | - | - | 1 | - | - | » All matches |
| Oberliga Nordrhein (1979-2008) | 1 | 1 | - | 1 | 63 | - | - | - | - | - | - | » All matches |
| Super League | 32 | 26 | 6 | 5 | 2.378 | 1 | - | - | 6 | - | - | » All matches |
| Cup | 1 | 1 | - | 1 | 24 | - | - | - | - | - | - | » All matches |
| A-League | 24 | 20 | 4 | 5 | 1.810 | 2 | - | 4 | 9 | - | - | » All matches |
| Total | 389 | 323 | 66 | 92 | 28.604 | 11 | 1 | - | 86 | 1 | 1 |
International matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Friendlies | 11 | 6 | 5 | 4 | 573 | - | - | - | 1 | - | - | » All matches |
| EURO Qualifiers | 3 | 3 | - | 2 | 263 | - | - | - | - | - | - | » All matches |
| Total | 14 | 9 | 5 | 6 | 836 | - | - | - | 1 | - | - | ||
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
| U21 Friendlies | 7 | 7 | - | 1 | 630 | - | - | - | 1 | - | - | » All matches |
| U21 EURO Qualifiers | 11 | 11 | - | 1 | 917 | - | - | - | 4 | - | - | » All matches |
| Total | 18 | 18 | - | 2 | 1.547 | - | - | - | 5 | - | - | ||
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
| U20 World Cup | 3 | - | 3 | - | 53 | - | - | - | - | - | - | » All matches |
| Total | 3 | - | 3 | - | 53 | - | - | - | - | - | - |