Leni
How the USA got here: The Americans won Group D, then defeated Colombia, China and Germany in knockout round play.
How Japan got here: The Japanese won Group C, then defeated Netherlands, Australia and England in knockout round play.
The matchup: Japan defeated the United States in the 2011 Women's World Cup on penalty kicks. A year later, the Americans avenged that loss with a 2-1 victory in the London Olympics final.