In April 2007, Martín became the first amateur ever to win a European Tour event when he captured the Estoril Open de Portugal title. As an amateur, he had to forfeit the winner’s prize money of €208,330, but the win still granted him exemption on the European Tour until the end of 2009. He turned professional in June 2007, and completed the season playing on both the European Tour and the PGA Tour, relying on sponsors’ invitations for PGA Tour events.
Martín did not enjoy immediate success on the European Tour after he turned professional, with only a single top ten finish in the 2008 and 2009 seasons, but he nevertheless managed to retain his card for the 2010 season by finishing 118th on the 2009 Race to Dubai. However, in the first event of the 2010 season, the Alfred Dunhill Championship, he won to become the first player to win on the European Tour as both an amateur and as a professional. In December 2010, he successfully defended the title.
After a poor 2012 season, Martin lost full playing rights on the European Tour and did not complete the Qualifying School.