Alberto Contador Velasco (Spanish pronunciation: ; born 6 December 1982) is a Spanish former professional cyclist. He is one of the most successful riders of his era, winning the Tour de France twice (2007, 2009), the Giro d'Italia twice (2008, 2015), and the Vuelta a España three times (2008, 2012, 2014). He is one of only seven riders to have won all three Grand Tours of cycling. He has also won the Velo d'Or a record 4 times.
He was regarded as the natural successor of Lance Armstrong and won the 2007 Tour de France with the Discovery Channel team. During his time at the Astana team, he won the 2008 Giro d'Italia, the 2008 Vuelta a España and the 2009 Tour de France. Between 2007 and 2011 he won six consecutive Grand Tours that he entered. This included winning the 2010 Tour de France with Astana, although it later emerged that he had tested positive for clenbuterol during the race. After a long battle in court, he was suspended by the Court of Arbitration for Sport and stripped of his 2010 Tour and 2011 Giro wins.