The 29-year-old has moved to the Serie A club for an initial fee of £750,00 (€1m) and could sign permanently for a further fee of £4.4m (€6m) at the end of the loan deal.
Blaszczykowski has been a regular for Borussia Dortmund, making 197 appearances since joining in 2007.
However, he has suffered from a number of injuries that have limited his playing time over the past two seasons.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Napoli | 7 | 5 | 1 | 1 | 14 | 5 | 9 | 16 |
| 2 | Juventus | 6 | 3 | 3 | 0 | 9 | 0 | 9 | 12 |
| 3 | AC Milan | 6 | 3 | 2 | 1 | 14 | 7 | 7 | 11 |
| 4 | Torino | 6 | 3 | 2 | 1 | 10 | 8 | 2 | 11 |
| 5 | Inter Milan | 6 | 3 | 2 | 1 | 13 | 7 | 6 | 11 |
| 6 | Udinese | 6 | 3 | 1 | 2 | 9 | 10 | -1 | 10 |
| 7 | Empoli | 6 | 2 | 4 | 0 | 5 | 2 | 3 | 10 |
| 8 | Lazio | 6 | 3 | 1 | 2 | 12 | 10 | 2 | 10 |
| 9 | Roma | 6 | 2 | 3 | 1 | 7 | 4 | 3 | 9 |
| 10 | Hellas VeronaHellas Verona | 7 | 3 | 0 | 4 | 12 | 12 | 0 | 9 |
| 11 | Como | 7 | 2 | 2 | 3 | 10 | 14 | -4 | 8 |
| 12 | Atalanta BCAtalanta | 6 | 2 | 1 | 3 | 11 | 12 | -1 | 7 |
| 13 | Bologna | 6 | 1 | 4 | 1 | 7 | 9 | -2 | 7 |
| 14 | Fiorentina | 6 | 1 | 4 | 1 | 7 | 7 | 0 | 7 |
| 15 | Lecce | 6 | 1 | 2 | 3 | 3 | 11 | -8 | 5 |
| 16 | CagliariCagliari | 6 | 1 | 2 | 3 | 4 | 10 | -6 | 5 |
| 17 | Genoa | 6 | 1 | 2 | 3 | 4 | 10 | -6 | 5 |
| 18 | Parma | 6 | 1 | 2 | 3 | 10 | 12 | -2 | 5 |
| 19 | VeneziaVenezia | 7 | 1 | 1 | 5 | 5 | 12 | -7 | 4 |
| 20 | Monza | 6 | 0 | 3 | 3 | 4 | 8 | -4 | 3 |
| > Serie A Full Table | |||||||||
