On 28 June 2013, Chelsea confirmed that they had reached an agreement for the season-long loan of Marin to Sevilla, subject to the completion of legal documentation and a medical. Marin scored his first goal for Sevilla in a 3–1 friendly win over Manchester United during Rio Ferdinand's testimonial. He netted two goals in Sevilla's first-leg Europa League play-off tie against Śląsk Wrocław, a 4–1 home win on 22 August. Marin started on the bench in the Europa final, coming on late in the second half, and then substituted in extra-time as Sevilla beat Benfica 4–2 in penalties. With this win, Marin won the Europa League in back to back seasons, winning it the year before with his home-club Chelsea.