The German winger joined the Blues from Werder Bremen in 2012 on long-term deal, but failed to establish himself in the first-team at Stamford Bridge. Marin was loaned to Sevilla at the beginning of the season as a result of the returning Jose Mourinho not including the 24-year-old in his plans. Having enjoyed a successful eight months with the Spanish side, who currently sit in seventh place in La Liga, Marin revealed an exit from Chelsea could become a reality this summer as long as he can stay fit from injury.