Sergi studied photography at the Institute of Photographic Studies of Catalonia and worked in local media for six years. His personal work focuses on migration from Africa to Europe and refugees in different countries, where he combines documentary photography with video. He has worked in many countries including Morocco, Algeria, Mali, Niger, Nigeria, Rwanda, Albania, Yemen, Guinea Bissau, Senegal, Colombia, Venezuela, Panama, Haiti, Ecuador and Brazil, South Sudan. His work has been published in magazines and newspapers such as; Time, Liberation, The Guardian, Newsweek Japan, Financial Times, Vanity Fair (Italy), Libération, Jeune Afrique, NWK Arabic, La Vanguardia Magazine, Paris Match, Nouvel Observateur, DaysJapan, Knak (Belgium), Night & Day, Stern, Figaró Magazine. He is the founder of the group of documentary photography Pandorafoto.