Kalezić was invited by RTP and OGAE Portugal to travel to Lisbon and perform at a number of events during the 2018 Eurovision Song Contest. Slavko performed remixes of his Eurovision 2017 song "Space" along with new single "El Ritmo" at the Eurofan Café, Wiwijam, Trumps Lisboa and Euroclub. He also attended the semi final in which Montenegro were competing as well as the Grand Final.