Udinese have confirmed that defender David Alaba is recovering from a muscle strain in his right calf.
The Serie A club published details of the injury on their official website after the 34-year-old underwent medical tests. Alaba has already started his rehabilitation, although Udinese have not said when he is expected to return.
The Austria international joined Udinese last month and has played in two Serie A matches since arriving.
Udinese are currently 16th in the Italian league table. Their next fixture is at home to Milan on 25 October.