The 23-year-old is expected to be out for up to four weeks, Dortmund's team doctor Markus Braun announced.
That means that he will miss the start of the new Bundesliga campaign, including tomorrow's DFB Super Cup fixture with Bayern Munich.
The German international joined Dortmund from 1860 Munich in 2009.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Bayern MunichBayern | 15 | 11 | 3 | 1 | 47 | 13 | 34 | 36 |
| 2 | Bayer LeverkusenB. Leverkusen | 15 | 9 | 5 | 1 | 37 | 21 | 16 | 32 |
| 3 | Eintracht FrankfurtFrankfurt | 15 | 8 | 3 | 4 | 35 | 23 | 12 | 27 |
| 4 | RB Leipzig | 15 | 8 | 3 | 4 | 24 | 20 | 4 | 27 |
| 5 | Mainz 05Mainz | 15 | 7 | 4 | 4 | 28 | 20 | 8 | 25 |
| 6 | Borussia DortmundDortmund | 15 | 7 | 4 | 4 | 28 | 22 | 6 | 25 |
| 7 | Werder Bremen | 15 | 7 | 4 | 4 | 26 | 25 | 1 | 25 |
| 8 | Borussia MonchengladbachBorussia M'bach | 15 | 7 | 3 | 5 | 25 | 20 | 5 | 24 |
| 9 | Freiburg | 15 | 7 | 3 | 5 | 21 | 24 | -3 | 24 |
| 10 | Stuttgart | 15 | 6 | 5 | 4 | 29 | 25 | 4 | 23 |
| 11 | Wolfsburg | 15 | 6 | 3 | 6 | 32 | 28 | 4 | 21 |
| 12 | Union BerlinUnion Berlin | 15 | 4 | 5 | 6 | 14 | 19 | -5 | 17 |
| 13 | Augsburg | 15 | 4 | 4 | 7 | 17 | 32 | -15 | 16 |
| 14 | St Pauli | 15 | 4 | 2 | 9 | 12 | 19 | -7 | 14 |
| 15 | Hoffenheim | 15 | 3 | 5 | 7 | 20 | 28 | -8 | 14 |
| 16 | Heidenheim | 15 | 3 | 1 | 11 | 18 | 33 | -15 | 10 |
| 17 | Holstein Kiel | 15 | 2 | 2 | 11 | 19 | 38 | -19 | 8 |
| 18 | VfL BochumVfL Bochum | 15 | 1 | 3 | 11 | 13 | 35 | -22 | 6 |
| > Bundesliga Full Table | |||||||||
