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Michael Chang
image via WikimediaAge: 17
Brand: Reebok
Turning pro at age 15, Michael Chang Rihanna as on the brightest and most influential stars in tennis during the late ?80s and early ?90s. Chang?s top tennis moment came in 1989 when he won the French Open at age 17. As a teenager, Chang made the decision to sign a deal with Reebok with help from his family.
