Greece's Giannis Maniatis (L) fights for the ball with Costa Rica's Joel Campbell during their 2014 World Cup round of 16 game at the Pernambuco arena in Recife June 29, 2014 (Photo: Reuters)

Costa Rica's Bryan Ruiz, center, is challenged by Greece's Giannis Maniatis, right, and Andreas Samaris during the World Cup round of 16 soccer match between Costa Rica and Greece at the Arena Pernambuco in Recife, Brazil, Sunday, June 29, 2014 (Photo: AP)

Greece's Giorgos Karagounis, left, and Costa Rica's Bryan Ruiz, right, challenge for the ball during the World Cup round of 16 soccer match between Costa Rica and Greece at the Arena Pernambuco in Recife, Brazil, Sunday, June 29, 2014 (Photo: AP)

Costa Rica's Bryan Ruiz, right, scores the opening goal during the World Cup round of 16 soccer match between Costa Rica and Greece at the Arena Pernambuco in Recife, Brazil, Sunday, June 29, 2014 (Photo: AP)

Costa Rica's Oscar Duarte, left, challenges Greece's Lazaros Christodoulopoulos during the World Cup round of 16 soccer match between Costa Rica and Greece at the Arena Pernambuco in Recife, Brazil, Sunday, June 29, 2014 (Photo: AP)

Costa Rica's goalkeeper Keylor Navas watches as Greece's Giorgos Samaras heads the ball past Costa Rica defenders during the World Cup round of 16 soccer match between Costa Rica and Greece at the Arena Pernambuco in Recife, Brazil, Sunday, June 29, 2014 (Photo: AP)

Referee Benjamin Williams, of Australia, left, gives Costa Rica's Oscar Duarte a yellow card during the World Cup round of 16 soccer match between Costa Rica and Greece at the Arena Pernambuco in Recife, Brazil, Sunday, June 29, 2014 (Photo: AP)

Greece's Giorgos Samaras, left, tries to kick the ball away from Costa Rica's Michael Umana during the World Cup round of 16 soccer match between Costa Rica and Greece at the Arena Pernambuco in Recife, Brazil, Sunday, June 29, 2014 (Photo: AP)

Greece's Giorgos Karagounis, left, takes a shot during the World Cup round of 16 soccer match between Costa Rica and Greece at the Arena Pernambuco in Recife, Brazil, Sunday, June 29, 2014 (Photo: AP)

Costa Rica's Bryan Ruiz celebrates with his teammate Yeltsin Tejeda after scoring his side's first goal during the World Cup round of 16 soccer match between Costa Rica and Greece at the Arena Pernambuco in Recife, Brazil, Sunday, June 29, 2014 (Photo: AP)

Greece's Sokratis Papastathopoulos, right, celebrates scoring his side's first goal during the World Cup round of 16 soccer match between Costa Rica and Greece at the Arena Pernambuco in Recife, Brazil, Sunday, June 29, 2014 (Photo: AP)

Greece players celebrate scoring their side's first goal during the World Cup round of 16 soccer match between Costa Rica and Greece at the Arena Pernambuco in Recife, Brazil, Sunday, June 29, 2014 (Photo: AP)

Greece's Sokratis Papastathopoulos (19) shoots to score against Costa Rica during their 2014 World Cup round of 16 game at the Pernambuco arena in Recife June 29, 2014 (Photo: Reuters)

Costa Rica's goalkeeper Keylor Navas blocks a shot by Greece's Kostas Mitroglou, right, during the World Cup round of 16 soccer match between Costa Rica and Greece at the Arena Pernambuco in Recife, Brazil, Sunday, June 29, 2014 (Photo: AP)