Chilean midfielder Mauricio Isla\'s season could be over after he was diagnosed with a cruciate knee ligament injury on Sunday. The Udinese player had to be stretchered off after a clash with AC Milan midfielder Massimo Ambrosini on Saturday. Udinese have said they will need several more days to fully assess the extent of his injury, but a ruptured cruciate injury ususally requires a period of around six months on the sidelines.