BARCELONA, Spain -- Barcelona says Lionel Messi will be sidelined for six to eight weeks because of his third leg injury of the season.

The Argentina forward hurt his left leg in Barcelona's 4-1 victory at Real Betis on Sunday and medical exams on Monday showed he needs a recovery period of up to two months.

Messi has been plagued by nagging muscle problems since the end of last season.

The 26-year-old star missed several weeks last month because of a right thigh problem after first hurting his left thigh in August. He was sidelined at the end of last season with a hamstring pull.

Also, Barcelona says midfielder Cesc Fabregas will need one week to recover from a right knee injury, forcing him to miss Spain's friendlies against Guinea and South Africa.