Olympiacos is one of the most successful clubs in
European water polo, having won 3
LEN Champions Leagues in
2015,
2021 and
2022, 3
LEN Super Cups in 2015, 2021, 2022 and 1
Euro Cup in
2014 and having overall a commanding presence in European competitions. Besides the 3 LEN Euro Leagues, 3 LEN Super Cups and 1 LEN Euro Cup titles, they were runners-up of the
LEN Euro League in 2017 and
2019, runners-up of the
LEN Super Cup in
2014, runners-up of the LEN Euro Cup in 2008 and
2018 and they have participated, altogether, in 9
Champions' League Final Fours (1996, 2010, 2011, 2015, 2016, 2017, 2019, 2021, 2022), as well as in 5 LEN Euro Cup Final Fours (2001, 2007, 2008, 2014, 2018), being semi-finalists of the same competition in 2009 and 2012. In 2014 Olympiacos won the
LEN Euro Cup in the
Final Four in Florence, beating home team
Firenze Waterpolo 10–9 in the final. One year later, Olympiacos were crowned
European Champions, winning the LEN Champions League in the
2015 Final Four in Piraeus, after a 10–9 win in the final against the then-reigning champions
Sabadell, who were undefeated for more than 3 years with 115 consecutive wins in all competitions. Olympiacos lifted the LEN Champions League title undefeated and having won 8 straight matches without even a single draw. Subsequently, Olympiacos won the
2015 LEN Super Cup as well, defeating
Plebiscito Padova, thus completing a continental Treble in 2015 (
LEN Champions League,
LEN Super Cup,
Greek Championship), winning season's all three available titles. In 2021 Olympiacos won their
second LEN Champions League title in
Budapest, beating home teams
UVSE (9–8 in the semi-final) and
Dunaújvárosi (7–6 in the final) with a roster composed entirely of
Greek players. They went on to win the Greek League and the Greek Cup, thus completing the first ever Triple Crown for a Greek club in the sport's history, which eventually became a Quadruple Crown after winning the 2021 LEN Super Cup. In 2022 Olympiacos were crowned
back-to-back European Champions in
Piraeus, beating
UVSE (18–11 in the semi-final) and
Sabadell (11–7 in the final). They went on to win the Greek League, the Greek Cup and the 2022 LEN Super Cup, thus completing the second (back-to-back) Quadruple Crown in their history. After the 2015 LEN Euroleague win of Olympiacos women's water polo team,
Olympiacos SFP became the only multi-sport club in European water polo history after
Pro Recco to have been crowned European Champions with both its
men's and women's departments, and the only club with both its departments currently active (
Pro Recco Women's department has been dissolved since 2012). Domestically, Olympiacos is the most successful Greek club, having won a record 14
Greek Championships, a record 6
Greek Cups, a record 3
Greek Super Cups and a record 5 Doubles. They also hold the all-time record for the most consecutive
Greek Championships, as they are the only team to have won
11 consecutive Greek Championship titles (2014–2024). They won their first two titles in 1995 and 1998, but their best performance in the league came after coach
Charis Pavlidis' arrival in 2007. Beginning from season 2010–11, Olympiacos has won eleven Greek Championships in thirteen seasons (2011, 2014–2023). In the 2015–16, 2019–20, 2020–21, 2021–22 and 2022–23 seasons, Olympiacos won the Greek Championship undefeated, winning every game in both the regular season and the play-offs. They won the first-ever
Greek Cup which was held in 2017–18 season and the first-ever
Greek Super Cup held in 2020. == History ==