AC Milan midfielder Giacomo Bonaventura has been ruled out for at least eight months after undergoing surgery on a serious injury to his left knee.
The 29-year-old Italy international has already been sidelined for a month and has now gone under the knife in the United States, leaving him facing a lengthy recovery period.
A statement from the Rossoneri confirmed: "AC Milan can announce that Giacomo Bonaventura has undergone surgery on the osteochondral lesion of his left knee.
"The cartilage repair procedure, carried out in Pittsburgh by surgeons Volker Musahl and Freddie Fu in the presence of the AC Milan medical staff, was successful and the recovery time is estimated at eight to nine months."
Bonaventura has been at Milan for just over four years, having started his career with Atalanta, where he spent seven years.
He has also won 14 Italy caps to date, having made his Azzurri debut in May 2013 against San Marino and had recently become something of a regular under current head coach Roberto Mancini.
Bonaventura adds to an injury list which is starting to cause boss Gennaro Gattuso some problems, with Mateo Musacchio, Lucas Biglia, Mattia Caldara and Ivan Strinic all currently sidelined.
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