Wolski, 20, who arrives from Legia Warsaw for an undisclosed fee, has put pen to paper a four-and-a-half-year contract with the Serie A outfit.
Meanwhile, Compper has signed a three-and-a-half-year deal after leaving Hoffenheim.
Compper, 27, has been capped once by Germany at senior international level.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Bayern MunichBayern | 11 | 9 | 2 | 0 | 36 | 7 | 29 | 29 |
| 2 | Eintracht FrankfurtFrankfurt | 11 | 7 | 2 | 2 | 27 | 16 | 11 | 23 |
| 3 | RB Leipzig | 11 | 6 | 3 | 2 | 18 | 9 | 9 | 21 |
| 4 | Bayer LeverkusenB. Leverkusen | 11 | 5 | 5 | 1 | 26 | 18 | 8 | 20 |
| 5 | Borussia DortmundDortmund | 11 | 6 | 1 | 4 | 22 | 18 | 4 | 19 |
| 6 | Borussia MonchengladbachBorussia M'bach | 11 | 5 | 2 | 4 | 17 | 14 | 3 | 17 |
| 7 | Freiburg | 11 | 5 | 2 | 4 | 13 | 15 | -2 | 17 |
| 8 | Mainz 05Mainz | 11 | 4 | 4 | 3 | 18 | 14 | 4 | 16 |
| 9 | Stuttgart | 11 | 4 | 4 | 3 | 21 | 19 | 2 | 16 |
| 10 | Union BerlinUnion Berlin | 11 | 4 | 4 | 3 | 9 | 9 | 0 | 16 |
| 11 | Wolfsburg | 11 | 4 | 3 | 4 | 20 | 18 | 2 | 15 |
| 12 | Werder Bremen | 11 | 4 | 3 | 4 | 17 | 22 | -5 | 15 |
| 13 | Hoffenheim | 11 | 3 | 3 | 5 | 17 | 22 | -5 | 12 |
| 14 | Augsburg | 11 | 3 | 3 | 5 | 13 | 23 | -10 | 12 |
| 15 | Heidenheim | 11 | 3 | 1 | 7 | 15 | 20 | -5 | 10 |
| 16 | St Pauli | 11 | 2 | 2 | 7 | 7 | 14 | -7 | 8 |
| 17 | Holstein Kiel | 11 | 1 | 2 | 8 | 12 | 28 | -16 | 5 |
| 18 | VfL BochumVfL Bochum | 11 | 0 | 2 | 9 | 10 | 32 | -22 | 2 |
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