According the the community shield programme, he broke his leg early in the 03-04 season and didn't really return to the first team til last season, where he played all but 3 of Valencias league games. His first season there in 01-02 he played 15 League games, in 02-03, 27 league games of 38, scoring 8 goals (actually joint top scorer) I don't think we need to worry, he was obviously fit for most of last season.