Nike has re-signed Andre Agassi, eight years after the retired American tennis champion defected to Adidas. He played under the Swoosh between 1988 and 2005. His wife, the German Steffi Graf, has been with the Three Stripes all her career. The 43-year-old Agassi will play a role in Nike's campaign for youth fitness, running under the “Designed to Move” platform. It should fit in nicely with Agassi's own youth-oriented charity, the Andre Agassi Foundation for Education, which promotes physical activities throughout the school day.