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 | FC Koln | 17 | 9 | 4 | 4 | 32 | 23 | 9 | 31 |
| 2 | Karlsruher SCKarlsruher | 17 | 8 | 5 | 4 | 34 | 31 | 3 | 29 |
| 3 | Hamburger SV | 17 | 7 | 7 | 3 | 39 | 23 | 16 | 28 |
| 4 | Elversberg | 17 | 8 | 4 | 5 | 31 | 22 | 9 | 28 |
| 5 | Magdeburg | 17 | 7 | 7 | 3 | 30 | 24 | 6 | 28 |
| 6 | SC PaderbornSC Paderborn | 17 | 7 | 7 | 3 | 29 | 24 | 5 | 28 |
| 7 | Hannover | 17 | 8 | 3 | 6 | 22 | 17 | 5 | 27 |
| 8 | Fortuna DusseldorfDusseldorf | 17 | 7 | 5 | 5 | 28 | 23 | 5 | 26 |
| 9 | KaiserslauternKaiserslautern | 17 | 7 | 5 | 5 | 30 | 27 | 3 | 26 |
| 10 | SV Darmstadt 98Darmstadt | 17 | 6 | 6 | 5 | 36 | 29 | 7 | 24 |
| 11 | Nuremberg | 17 | 6 | 4 | 7 | 31 | 30 | 1 | 22 |
| 12 | Hertha Berlin | 17 | 6 | 4 | 7 | 27 | 27 | 0 | 22 |
| 13 | Schalke 04Schalke | 17 | 5 | 5 | 7 | 32 | 33 | -1 | 20 |
| 14 | Greuther Furth | 17 | 5 | 5 | 7 | 24 | 33 | -9 | 20 |
| 15 | Preussen Munster | 17 | 3 | 7 | 7 | 18 | 23 | -5 | 16 |
| 16 | SSV UlmUlm | 17 | 2 | 8 | 7 | 16 | 20 | -4 | 14 |
| 17 | Eintracht BraunschweigBraunschweig | 17 | 3 | 4 | 10 | 16 | 36 | -20 | 13 |
| 18 | Jahn RegensburgJahn | 17 | 3 | 2 | 12 | 9 | 39 | -30 | 11 |
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