Germany won both the men's and women's senior titles as the Canoe Polo World Championships concluded in Welland in Canada.
The men's win was their first in the 24-year history of the event and was a hugely emotional success following the sudden death of player Fiete Junge on the eve of the tournament.
They beat Italy 4-1 while the women clinched a sixth world title by defeating Britain 3-1.
Men's coach Bjorn Zirotzki broke down in tears as he waved Junge's number ten vest to the crowd after the final whistle.
"It's a very emotional win for us," he said.
"All the circumstances, all the bad things that happened, it's unbelievable that we were able to make it.
"We are not a team of superstars, we are a superstar team.
"The last time we met with Fiete we talked about how we wanted to be world champions.
"He would say all the time 'hey guys, let's do this, so we did it for Fiete, we did it for us, we did it for the team'.
"It's unbelievable what these guys made, it's unbelievable what has happened to us in the past couple of weeks.
"Normally it's not possible to do it, but we did it."
The German women reclaimed the title they lost to New Zealand at the last edition in 2016.
"We have a coach who is a big thinker, and we talk about tactics," said captain Elena Giles.
"We have two or three very good players in defence, and I think we are forgiving for what is going wrong.
"We don’t focus on that too much, we've been taking on new, younger players on the team every year, and that allows us to develop them into our culture and into the game we are playing, and it’s been working really well."
Spain won a third consecutive men's bronze medal, beating France 5-4.
Italy won the women's bronze by also beating France, 4-1.