Madrid - Betis midfielder Mehmet Aurelio will be out of action for around four months, the Spanish Liga club said Friday.

According to Betis head doctor Tomas Calero, the Turkish-Brazilian playmaker damaged the cartilage in his right knee in Wednesday's 2-1 defeat at home to Valencia.

Mehmet Aurelio, 31, will be operated upon in Brazil next week, and will be out of action until August.

He joined Betis from Fenerbahce in July 2008, after performing well for semi-finalists Turkey at Euro 2008. (dpa)