Which Astana rider was blood-doped when he won the 13th stage of Tour de France 2007?

Explanation

Alexander Vinokourov (born 1973) is a Kazakhstani professional cyclist. Vinokourov came third in Tour de France 2003. In Tour de France 2007 it emerged during the race that he had been blood-doped when he won the 13th stage. After this, the whole Astana-team withdrew from the rest of the Tour.