The Great Britain men's water polo team play their opening match against Romania on Sunday, and captain Craig Figes believes they can pull off a shock victory.
Team GB have been drawn in the so-called Group of Death, in which they will come up against the top four teams from the Beijing Olympics, as well as Romania.
Figes led his side to a 17-7 defeat against their first opponents in Dublin earlier this month, but the 33-year-old from Bristol said the circumstances are different.
"I think tomorrow is going to be a completely different game," he said.
"Obviously we've got a home advantage and the team is another couple of weeks into preparation.
"When we played Romania in Dublin it was the last game of a really difficult tournament.
"We had already played Hungary, Montenegro and Croatia, so we were a little bit tired by the end, but we can really step up a level."
Although Romania are Team GB's weakest opposition on paper, Figes believes it will still take a performance of a lifetime to take something from the game.
"They are a top team, so we have to have the best performance of our lives to get a result against them," he said.
Team GB take on Serbia on July 31, USA on August 2, Hungary on August 4 and Montenegro on August 6. In the 2008 Games, Hungary won gold, USA claimed silver, Serbia picked up bronze, and Montenegro came fourth.
Figes knows the odds are stacked against his team, but said the group are prepared for the challenge.
"Lot's of people are calling our group the Group of Death, and it really is," he said. "It's a really really tough group for us but we see that as a challenge."