Cervantes started out as a motocross rider, a discipline in which he holds five Spanish national titles, before moving on to enduro racing. In 2005, at the young age of 23, he made motorcycle racing history by becoming the first Spanish enduro world champion in category E1 enduro (100 to 125 cc two-stroke or 175 - 250 cc four-stroke). In 2006, he successfully defended his title. The following year, he won the world championship in the E3 category (290 to 500 cc two-stroke or 475 - 650 cc four-stroke). In the 2008 season, continuing with KTM, he finished second to Honda's Mika Ahola.