"Nesta has had surgery on his right arm after fracturing the fourth metacarpal in a friendly match against Juventus in the Tim Trophy, it was a complete success and he should be available for the opening day of the championship," it said.
The 34-year-old former World Cup winner with Italy has been plagued with injuries in the last four years, missing the entire 2008-09 season with a back problem.
He has made 78 appearances for Italy and scored six goals in 181 games for Milan since he joined them from Serie A rivals Lazio in 2002.
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