Zlatan Ibrahimovic is a major doubt for Milan's opening Serie A game of the season at Cagliari later this month.
The Swede twisted his ankle in Sunday's 2-2 friendly with Malmo and is expected to be sidelined for two weeks as a result.
The international striker has undergone a series of tests which confirmed a distortion trauma.
The Italian champions open their campaign away to Cagliari on Saturday 27 August.
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