U.S. men's water polo team captain Tony Azevedo (R) trains for the London 2012 Olympics in Thousand Oaks, near Los Angeles, California, April 12, 2012. The team won the silver medal at the 2008 Beijing Olympics. (Lucy Nicholson/Reuters)

The Americans join the nine-time champions in a loaded group that also includes perennial power Serbia, Romania and Britain. Greece, Italy, Kazakhstan, Spain, Australia and Croatia make up the other group for the 12-team competition that will begin on July 29 at the Olympic Park in east London. The first day of matches includes a tantalizing matchup between Hungary and Serbia, who have combined for 21 world titles and 18 gold medals.

On the women’s side, the U.S. is grouped with Hungary, Spain and China in Group A. Former gold medalists Australia (2000) and Italy (2004) lead Group B which also includes Russia and Britain.

See the full tournament schedule here.

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Manu Ginobli leads Argentina’s “Golden Generation” on one more run

Profiles in Speed: Matthew Centrowitz learns the strategy behind speed

Missy Franklin has body built for speed

Carmelita Jeter shows value of technology in training