Portugal's forward Cristiano Ronaldo reacts in a funny way during a training session. (All Pics/ AFP)

Portugal's forward Cristiano Ronaldo reacts in a funny way during a training session. (All Pics/ AFP)

A Brazilian fan watches a live screening of her team's match against Croatia

A Brazilian fan watches a live screening of her team's match against Croatia

A fan of Portugal's forward Cristiano Ronaldo runs onto the pitch

A fan of Portugal's forward Cristiano Ronaldo runs onto the pitch

Lionel Messi (R) yawns next to teammate forward Ezequiel Lavezzi at the beginning of a training session

Lionel Messi (R) yawns next to teammate forward Ezequiel Lavezzi at the beginning of a training session

Argentinian supporters pose with a t-shirt featuring a picture of Pope Francis outside of the Maracana Stadium

Argentinian supporters pose with a t-shirt featuring a picture of Pope Francis outside of the Maracana Stadium

A picture shows the tattoo of Italy's midfielder Daniele De Rossi as he takes part in a training session

A picture shows the tattoo of Italy's midfielder Daniele De Rossi as he takes part in a training session

Cameroon's forward Samuel Eto'o makes a funny face during a training session

Cameroon's forward Samuel Eto'o makes a funny face during a training session

Argentina's fan kisses a fake trophy before for the Group F football match between Argentina and Bosnia-Hercegovina

Argentina's fan kisses a fake trophy before for the Group F football match between Argentina and Bosnia-Hercegovina

A football fan with a child is made up in the colors of Brazil (top), Uruguay (R) and Costa Rica (L) prior to a Group D football match between Uruguay and Costa Rica

A football fan with a child is made up in the colors of Brazil (top), Uruguay (R) and Costa Rica (L) prior to a Group D football match between Uruguay and Costa Rica

Cameroon's goalkeeper Charles Itandje listens to music as he arrives for training

Cameroon's goalkeeper Charles Itandje listens to music as he arrives for training

An Argentinian fan poses covered on body paint in the colours of the Argentinian national flag

An Argentinian fan poses covered on body paint in the colours of the Argentinian national flag

Argentina's fan wears a mask of Argentina's forward and captain Lionel Messi before the Group F football match between Argentina and Bosnia-Hercegovina

Argentina's fan wears a mask of Argentina's forward and captain Lionel Messi before the Group F football match between Argentina and Bosnia-Hercegovina

A Costa Rica national football team fan looks on in San Jose after Costa Rica defeated Uruguay

A Costa Rica national football team fan looks on in San Jose after Costa Rica defeated Uruguay

An Italy fan (R) kisses an England fan prior to a Group D football match between England and Italy

An Italy fan (R) kisses an England fan prior to a Group D football match between England and Italy

A supporter of the Netherlands' football team gives the thumb up before a Group B football match between Spain and the Netherlands

A supporter of the Netherlands' football team gives the thumb up before a Group B football match between Spain and the Netherlands

Argentina's defender Pablo Zabaleta's short is seen torn during a Group F football match between Argentina and Bosnia-Hercegovina

Argentina's defender Pablo Zabaleta's short is seen torn during a Group F football match between Argentina and Bosnia-Hercegovina

Netherlands' Robin van Persie runs along with his daughter during a training session

Netherlands' Robin van Persie runs along with his daughter during a training session

Two men depicting former football stars Ronaldo (L) of Brazil and Diego Maradona of Argentina kiss a mock-up World Cup trophy outside the Maracana stadium

Two men depicting former football stars Ronaldo (L) of Brazil and Diego Maradona of Argentina kiss a mock-up World Cup trophy outside the Maracana stadium