Antonio Nocerino “has all the qualities to do well” at Milan, said director of sport Ariedo Braida.
The midfielder completed his transfer from Palermo just minutes before the deadline, reportedly for just €0.5m plus youngster Ricardo Ferreira.
“He is an Italy player who always shows great humility on the field,” Braida told the official Rossoneri website.
“He knows how to sacrifice himself for his teammates, has a solid work ethic and every now and then scores goals.
“He has all the qualities to do well here.”
Nocerino effectively replaced Gennaro Gattuso in the Italy midfield and is now brought in as his heir at Milan.
The Rossoneri brought in a new midfielder after Mathieu Flamini was ruled out for up to six months with a knee ligament injury.
Nocerino is on international duty with the Azzurri for the Euro 2012 qualifiers against the Faroe Islands and Slovenia.
This means he will only complete his medical and arrive at the Milanello training ground on September 7.