The Hamburger SV captain was taken off in the 4-2 defeat to Eintracht Braunschweig in the Bundesliga on Saturday.
He could now miss matches against Borussia Dortmund, Werder Bremen and Eintracht Frankfurt.
Hamburger, who are 17th in the Bundesliga, sacked Bert van Marwijk after their defeat at the weekend.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Hannover | 12 | 7 | 1 | 4 | 16 | 10 | 6 | 22 |
| 2 | SC PaderbornSC Paderborn | 12 | 5 | 6 | 1 | 19 | 14 | 5 | 21 |
| 3 | Fortuna DusseldorfDusseldorf | 12 | 6 | 3 | 3 | 18 | 13 | 5 | 21 |
| 4 | Karlsruher SCKarlsruher | 12 | 5 | 5 | 2 | 23 | 20 | 3 | 20 |
| 5 | Hamburger SV | 12 | 5 | 4 | 3 | 26 | 17 | 9 | 19 |
| 6 | Elversberg | 12 | 5 | 4 | 3 | 22 | 14 | 8 | 19 |
| 7 | Nuremberg | 12 | 5 | 3 | 4 | 24 | 20 | 4 | 18 |
| 8 | FC Koln | 12 | 5 | 3 | 4 | 24 | 20 | 4 | 18 |
| 9 | Magdeburg | 12 | 4 | 6 | 2 | 20 | 17 | 3 | 18 |
| 10 | KaiserslauternKaiserslautern | 12 | 4 | 5 | 3 | 20 | 18 | 2 | 17 |
| 11 | Hertha Berlin | 12 | 5 | 2 | 5 | 20 | 20 | 0 | 17 |
| 12 | SV Darmstadt 98Darmstadt | 12 | 4 | 4 | 4 | 26 | 23 | 3 | 16 |
| 13 | Greuther Furth | 12 | 3 | 4 | 5 | 18 | 23 | -5 | 13 |
| 14 | Schalke 04Schalke | 12 | 3 | 3 | 6 | 21 | 24 | -3 | 12 |
| 15 | Eintracht BraunschweigBraunschweig | 12 | 3 | 3 | 6 | 14 | 24 | -10 | 12 |
| 16 | Preussen Munster | 12 | 2 | 5 | 5 | 15 | 19 | -4 | 11 |
| 17 | SSV UlmUlm | 12 | 2 | 4 | 6 | 10 | 13 | -3 | 10 |
| 18 | Jahn RegensburgJahn | 12 | 2 | 1 | 9 | 5 | 32 | -27 | 7 |
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