 Complete the following phrase:  Greece is often regarded as an international powerhouse in both mens and womens water polo, with its clubs and nationals teams having achieved a great number of distinctions in international competitions. The Greek mens national water polo team have won a silver medal in the 1997 FINA World Cup, two bronze medals in the FINA World League in 2004 and 2006, a bronze medal in the 2005 World Aquatics Championships and the 4th place in the 2004 Olympic Games. The Greek womens national water polo teams most important achievements are the gold medal in the 2011 World Aquatics Championships, the silver medals in the 2004 Olympic Games, 2010 European Championship and 