 On 30 August 2018, Refaelov joined fellow Belgian First Division A side Royal Antwerp on an initial season-long loan.He scored his first goal for the club in a 5–1 league victory over Zulte Waregem on 16 September.On 9 December, Refaelov netted twice in a 3–0 victory over Cercle Brugge K.S.V., moving within four points of league leaders Genk through 18 matches.