Diaz sought sporting headlines at the UCI BMX World Championships, where she claimed a total of five medals (three golds, one silver, and one bronze) in the women's elite category, making her the world's most decorated female rider of all time. At the 2007 Pan American Games in Rio de Janeiro, Brazil, Diaz powered her lead over the eight-strong female squad on the final stretch to take home the first gold for Argentina in the women's BMX category, finishing ahead of host nation's Ana Flávia Sgobin.
