Argentina's forward Lionel Messi heads the ball during a training session
Uruguayan footballer Ernesto Chevanton heads the ball during a training session
Brazilian players Kaka (L) and goalkeeper Julio Cesar eye the ball during a training session
Venezuela's national football team player Ronald Vargas during a training session
Colombian national football team coach Eduardo Lara holds the ball at the end of a training session
Paraguayan footballer Nelson Haedo Valdez controls the ball during a training session
Chilean footballers Alexis Sanchez (L) and Mark Gonzalez joke before the start of a training session
Ecuadorean footballers Carlos Castro (L) and Fernando Hidalgo vie for the ball during a training session
Members of the Peruvian national football team warm up during a training session
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