One of two reasons: 1) Coach is a ********ing idiot. 2) He has low self confidence in Spain. But that can be directly from sitting on the bench all season, so back to the first reason.
An article about Ben Sahar and Gai Assulin heading into tonight's Barcelona derby, although it is in Spanish: http://www.sport.es/default.asp?idpublicacio_PK=44&idioma=CAS&idnoticia_PK=705267&idseccio_PK=803