Álex Márquez i Alentà (born 23 April 1996) is a Spanish Grand Prix motorcycle road racer, and the younger brother of Marc Márquez, who also competes at Grand Prix level. Márquez was the 2012 Spanish Moto3 Championship winner, and won the 2014 Moto3 World Championship, defeating Jack Miller by two points in the last round at Valencia. In the process, he and Marc became the first brothers to win world motorcycle racing titles in the same year.
He began the 2010 season in the CEV Buckler 125cc championship, competing with the Monlau Competition team, along with Álex Rins and Niklas Ajo. Márquez did not participate in the opening round at Circuit de Barcelona-Catalunya, as he was not old enough to do so – he did not turn fourteen until five days after the event. He finished eleventh in his first start at Albacete, having qualified tenth. He retired at Jerez due to clutch problems. He added finishes of seventh and sixth at Motorland Aragón and Albacete, before retiring from the final two races at Valencia and Jerez. He finished eleventh in the final riders' championship standings.