Costa Rican goalkeeper Keylor Navas joins Real Madrid after stellar World Cup

Costa Rica international goalkeeper Keylor Navas, kisses his Real Madrid's t-shirt as he poses during his official presentation at the Santiago Bernabeu stadium in Madrid, Spain, Tuesday, Aug. 5, 2014, after signing for the Spanish soccer giants Real Madrid. (AP Photo/Andres Kudacki) (The Associated Press)

Costa Rica international soccer player Keylor Navas, right, and Real Madrid President Florentino Perez, left, pose during his official presentation at the Santiago Bernabeu stadium in Madrid, Spain, Tuesday, Aug. 5, 2014, after signing for Real Madrid. (AP Photo/Andres Kudacki) (The Associated Press)

Real Madrid introduced goalkeeper Keylor Navas after he signed a six-year contract with the Spanish club. Navas helped Costa Rica reach the World Cup quarterfinals for the first time this summer.

Madrid announced the deal Sunday after reaching an agreement with the Spanish club Levante that is reportedly worth $13.4 million.

Navas said Tuesday he has a chance to "learn from the best," with Iker Casillas and Diego Lopez already part of coach Carlo Ancelotti's first team. Madrid President Florentino Perez lauded Navas for his "brilliant career" before saying he now faces his "biggest challenge."

Navas was greeted by thousands of fans, many waving Costa Rica's flag, before he hurled balls into the Santiago Bernabeu stands.