Roger Federer defeats Juan Martín del Potro to win World Tennis Tournament in Miami . In South America , Spain 's Nicolas Almagro retained his Brazil Open crown with a 6-3 4-6 6-4 victory over Italy 's Filippo Volandri . World No . 3 beats Argentinian 6 - 1 6 - 4 in one hour and 26 minutes to seal victory . It is Federer 's second Rotterdam title , seven years after first winning . Spain 's Nicolas Almagro wins Brazil Open by beating Italy 's Filippo Volandri .
Roger Federer defeats Juan Martín del Potro to win World Tennis Tournament in Miami . World No . 3 beats Argentinian 6 - 1 6 - 4 in one hour and 26 minutes to seal victory . It is Federer 's second Rotterdam title , seven years after first winning . Spain 's Nicolas Almagro wins Brazil Open by beating Italy 's Filippo Volandri .