Athletic Bilbao's Spain midfielder Pablo Orbaiz will be sidelined for four weeks due to a strained left knee ligament.
Orbaiz sustained the injury on Sunday during Bilbao's 3-2 victory at Gimnastic Tarragona, the club said Tuesday.
Bilbao is 17th in the 20-team first division with five points from six games following its first win of the season.
© The Canadian Press, 2007