 In European competitions, they reached 2006–07 LEN Euroleague Final Four in Milan, where they lost 10–9 to eventual European Champions Pro Recco in a thrilling semi-final that was decided in the last seconds of the game.In 2011, Thodoris Vlachos (who had a long and successful career in Olympiacos as a player) became the new head coach of the team.From 2011 to 2019 under the guidance of Vlachos, Olympiacos have won 1 LEN Champions League, 7 Greek League titles, 6 Greek Cups, 1 Greek Super Cup, 1 Continental Quadruple, and 6 domestic Doubles.