| Transfer date | Old club | New club | Type | Amount |
|---|---|---|---|---|
| 2021-07-01 |
Monza
|
Hertha Berlin
|
Free | € 0 |
| 2020-09-28 |
Fiorentina
|
Monza
|
Transfer | - |
| 2020-01-31 |
Fiorentina
|
Besiktas
|
Loan | - |
| 2019-01-21 |
Sassuolo
|
FC Barcelona
|
Loan | - |
| 2018-07-05 |
Eintracht Frankfurt
|
Sassuolo
|
Free | € 0 |
| 2017-08-18 |
Las Palmas
|
Eintracht Frankfurt
|
Free | € 0 |
| 2016-08-02 |
AC Milan
|
Las Palmas
|
Free | € 0 |
| 2013-08-30 |
AC Milan
|
FC Schalke 04
|
Transfer | € 12 million |
| 2011-07-01 |
Genoa
|
AC Milan
|
Transfer | € 7.5 million |
| 2010-08-16 |
Genoa
|
AC Milan
|
Loan | - |
| 2010-07-01 |
Portsmouth
|
Genoa
|
Transfer | € 6.5 million |
| 2009-09-01 |
Tottenham
|
Portsmouth
|
Transfer | € 4.5 million |
| 2009-07-01 |
Borussia Dortmund
|
Tottenham
|
Transfer | - |
| 2009-01-11 |
Tottenham
|
Borussia Dortmund
|
Loan | - |
| 2007-08-01 |
Hertha Berlin
|
Tottenham
|
Transfer | € 7.9 million |