The 29-year-old has been impressive in recent weeks under Jose Mourinho after finally earning a regular place following lengthy injury problems.
The former AC Milan star wrote on his official Facebook and Twitter accounts: "I'm very happy to return to the national team.
"After a long time, the emotion of coming back is very big. Thanks to all those who, like me, where waiting for this moment."
"His return is logical for all that he has done in the last few months. I had always said that he would be back as soon he recovered and now he has a good chance."