 He was promoted to the first team for the 2009–10 season, making his La Liga debut on 19 September by playing 30 minutes at Deportivo de La Coruña for a 3–2 win, after coming on as a substitute for Ben Sahar.He quickly established himself in the first team and, on 20 December 2009, scored his first goal in a 2–0 home win against UD Almería; however, his campaign ended prematurely in March 2010, after he broke his leg in a match against Sevilla FC.Márquez recovered fully for 2010–11, being an undisputed starter for the Mauricio Pochettino-led side while partnering another Espanyol youth graduate, Raúl Baena, in central midfield.