 In 2018, they won the 2017–18 LEN Champions League in Genoa, beating once again a home team in the final, the Italian powerhouse Pro Recco, the most successful club in the competition with 8 titles.Olympiacos dominated the final game and won the title with a 9–7 scoreline against the Italian side inside their home ground.Along with their second LEN Champions League title, they also completed the second Quadruple Crown in their history (LEN Champions League, Greek Championship, Greek Cup, Greek Super Cup).