 She won her first major title at the Irish International tournament coming throughugh the qualification stage and beating the Dutch player Rachel Van Cutsen in the final with the rubber game.In 2011, she alongside her teammate, Beatriz Corrales, made history for the Spanish badminton, after making all-Spanish final at the continental European Junior Championships held in Vantaa, Finland, and Marín grabbed the gold medal.She also competed at the World Junior Championships in Taipei, reaching the semi-finals, but lost to Elisabeth Purwaningtyas of Indonesia and settled for the bronze medal.