Costa Rica has been the Cinderella story of the 2014 FIFA World Cup. Few game them a chance to even get out of the group stage, but they overcame England, Italy and Uruguay to win the group and are now in the Quarterfinals.
A lot of the credit of the Costa Rican success has to go to goalkeeper Keylor Navas.
Navas has been able to be so successful thanks to his training technique: Saving hard-hit tennis balls hit by pro tennis player Pablo Andujar.
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