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 | 8 | 6 | 2 | 0 | 29 | 7 | 22 | 20 |
| 2 | RB Leipzig | 8 | 6 | 2 | 0 | 14 | 3 | 11 | 20 |
| 3 | Bayer LeverkusenB. Leverkusen | 8 | 4 | 3 | 1 | 20 | 15 | 5 | 15 |
| 4 | Union BerlinUnion Berlin | 8 | 4 | 3 | 1 | 9 | 5 | 4 | 15 |
| 5 | Freiburg | 8 | 5 | 0 | 3 | 13 | 11 | 2 | 15 |
| 6 | Eintracht FrankfurtFrankfurt | 8 | 4 | 2 | 2 | 16 | 12 | 4 | 14 |
| 7 | Borussia DortmundDortmund | 8 | 4 | 1 | 3 | 15 | 14 | 1 | 13 |
| 8 | Stuttgart | 8 | 3 | 3 | 2 | 17 | 16 | 1 | 12 |
| 9 | Werder Bremen | 8 | 3 | 3 | 2 | 14 | 16 | -2 | 12 |
| 10 | Heidenheim | 8 | 3 | 1 | 4 | 12 | 11 | 1 | 10 |
| 11 | Borussia MonchengladbachBorussia M'bach | 8 | 3 | 1 | 4 | 11 | 13 | -2 | 10 |
| 12 | Augsburg | 8 | 3 | 1 | 4 | 12 | 19 | -7 | 10 |
| 13 | Mainz 05Mainz | 8 | 2 | 3 | 3 | 12 | 13 | -1 | 9 |
| 14 | Wolfsburg | 8 | 2 | 2 | 4 | 15 | 16 | -1 | 8 |
| 15 | Hoffenheim | 8 | 2 | 2 | 4 | 13 | 17 | -4 | 8 |
| 16 | St Pauli | 8 | 1 | 2 | 5 | 5 | 11 | -6 | 5 |
| 17 | Holstein Kiel | 8 | 0 | 2 | 6 | 10 | 23 | -13 | 2 |
| 18 | VfL BochumVfL Bochum | 8 | 0 | 1 | 7 | 7 | 22 | -15 | 1 |
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