[3] On 10 March, the EBU ordered Mimoune and Spanish boxer Kerman Lejarraga the opportunity to face off for its European Union welterweight title vacated by Paulie Malignaggi.
[5] He was replaced by undefeated Spanish prospect "El Sultan" Nabil Krissi for an event scheduled for 6 May in Noisy-le-Grand, France, featuring a triple-headliner of bouts between Spaniards and Frenchmen vying for European Union titles.
[9] On 7 October, Mimoune defeated British welterweight Sam Eggington to win the European championship in Manchester, England.
[11] On 20 January 2018, Mimoune faced undefeated Argentine boxer Emiliano Dominguez Rodriguez for the vacant IBO world title last held by Julius Indongo.
[12][13] On 20 October, Mimoune defeated Franck Petitjean by unanimous decision to retain his IBO light-welterweight title in Dakar, Senegal.