At the 2006 European Championships, in a contest where pre-race favourite Simon Vroemen was ruled out due to food poisoning, Blanco tried to outrun the pack of competitors after the first three-thirds which were somewhat slow. Accelerating with 500 metres to go, Blanco led the race with one lap left. With 150 metres left, he was overcome by Jukka Keskisalo, but hung on to second place.[1]
His personal best time is 8:12.86 minutes, achieved in Huelva in June 2006.[2]
After winning the bronze medal at the 2010 European Championships, it was revealed that Blanco had tested positive for erythropoietin at the Spanish Championships earlier that year. He received a two-year doping ban and would be stripped of his bronze medal which would go to the fourth placer, Ion Luchianov.[3]