Timothy Bradley Jr.'s breakdown: What to expect when Canelo faces Kovalev

Canelo Alvarez steps up to the light heavyweight division Saturday in pursuit of Sergey Kovalev's world title. As a middleweight titleholder moving up 15 pounds, ESPN's No. 3 pound-for-pound fighter in the world faces certain risks against a fighter of Kovalev's size and experience, although questions about what kind of fighter Kovalev is at age 36 linger as well.