In pictures: World Cup fans full of tears, joy on first day of knockout stage

A fan of Chile reacts after their team loses to Brazil and is eliminated from the 2014 World Cup.

Brazil soccer fans watch their team's World Cup round of 16 match against Chile on TV outside of the Vai Vai Samba school in Sao Paulo.

Colombia fans watch a broadcast of the 2014 World Cup round of 16 game between Colombia and Uruguay, in Cali.

Uruguay soccer fans gather outside the home of Uruguay's player Luis Suarez to watch the match between Uruguay and Colombia on the outskirts of Montevideo, Uruguay.

A Brazil soccer fan rests covered with Brazil's national flag.

Fans of Chile react after their team loses against Brazil during World Cup screening in downtown Santiago.

A young fan, with his face painted in Colombian colours, watches a broadcast in Cali, Colombia.

A child sleeps in an improvised bed as Brazil soccer fans celebrate their team's victory against Chile during a 2014 World Cup round of 16 game, in the old part of Recife.

Fans of Uruguay hold a baby doll dressed in Brazil jersey before their 2014 World Cup round of 16 game against Colombia at the Maracana stadium in Rio de Janeiro.

A Chile soccer fan blows a horn as he watch his team's World Cup round of 16 match against Brazil on TV in Santiago, Chile.