World Cup 2014 knockout rounds
Switzerland's Haris Seferovic (back) fights for the ball with Argentina's Ezequiel Garay during their 2014 World Cup round of 16 game at the Corinthians arena in Sao Paulo, July 1, 2014.
World Cup 2014
President Barack Obama reacts as he watches the World Cup soccer match between the U.S. and Belgium during a staff viewing party in an auditorium at the Eisenhower Executive Office Building in Washington, July 1, 2014.
World Cup 2014
Goalkeeper Tim Howard of the U.S. saves a shot during their 2014 World Cup round of 16 game against Belgium at the Fonte Nova arena in Salvador, July 1, 2014.
World Cup 2014
Belgium's Romelu Lukaku celebrates with Kevin De Bruyne (R) after scoring a goal during extra time in the 2014 World Cup round of 16 game between Belgium and the U.S. at the Fonte Nova arena in Salvador, July 1, 2014.
World Cup 2014
Germany's Mesut Ozil celebrates scoring their second goal during extra time in their 2014 World Cup round of 16 game against Algeria at the Beira Rio stadium in Porto Alegre, June 30, 2014.
World Cup 2014
Algeria's El Arabi Soudani (L) fights for the ball with Germany's Shkodran Mustafi during their 2014 World Cup round of 16 game at the Beira Rio stadium in Porto Alegre, June 30, 2014.
World Cup 2014
France's Yohan Cabaye (L) fights for the ball with Nigeria's Victor Moses during their 2014 World Cup round of 16 game at the Brasilia national stadium in Brasilia, June 30, 2014.
World Cup 2014
France's Yohan Cabaye runs for the ball during their 2014 World Cup round of 16 game against Nigeria at the Brasilia national stadium in Brasilia, June 30, 2014.
World Cup 2014
Costa Rica's Joel Campbell falls as Greece's Andreas Samaris gestures during their 2014 World Cup round of 16 game at the Pernambuco arena in Recife, June 29, 2014.
World Cup 2014
Mexico's Giovani Dos Santos celebrates after scoring a goal against the Netherlands during their 2014 World Cup round of 16 game at the Castelao arena in Fortaleza, June 29, 2014.
World Cup 2014
Costa Rica's Michael Umana (L) celebrates with Keilor Navas after he scored the decisive penalty against Greece during a shootout in their 2014 World Cup round of 16 game at the Pernambuco arena in Recife, June 29, 2014.
World Cup 2014
Dirk Kuyt of the Netherlands celebrates after teammate Wesley Sneijder scored a goal during their 2014 World Cup round of 16 game against Mexico at the Castelao arena in Fortaleza June 29, 2014.
World Cup 2014
Colombia's James Rodriguez (2nd R) scores a goal past Uruguay's Diego Godin during their 2014 World Cup round of 16 game at the Maracana stadium in Rio de Janeiro, June 28, 2014.
World Cup 2014
Uruguay's goalkeeper Fernando Muslera concedes a second goal scored by Colombia's James Rodriguez during their 2014 World Cup round of 16 game at the Maracana stadium in Rio de Janeiro, June 28, 2014.
World Cup 2014
Brazil's Marcelo fights for the ball with Chile's Charles Aranguiz during their 2014 World Cup round of 16 game at the Mineirao stadium in Belo Horizonte, June 28, 2014.
World Cup 2014
Brazilian soccer fans celebrate their victory in the Bixiga neighbourhood in Sao Paulo at the end of the 2014 World Cup round of 16 soccer match between Brazil and Chile in Belo Horizonte, June 28, 2014.