Adrian Mutu has been ruled out of Romania's 2010 FIFA World Cup South Africa™ qualifier against Austria, the Romanian Football Federation have announced.

Mutu will return to Florence, Italy - where he plays his club football - to undergo surgery on the knee. The former Chelsea striker complained of pain in his knee after Romania's 3-2 defeat to Serbia on Saturday.

Romania stand fifth in Group 7 of the FIFA World Cup European Zone qualifying with just one win from four games. Serbia top the group ahead of Lithuania, France and Austria, with the Faroe Islands rooted to the bottom.