The current pound-for-pound king is none other than Manny Pacquiao. Throughout the years, fighters like Roberto Duran, Sugar Leonard, Roy Jones Jr. and Floyd Mayweather have all held the covenant title of pound-for-pound best fighter in the world.
But as Pacquiao gets older and approaches retirement, many fighters are looking to take the prestigious No. 1 spot. It is quite hard to predict such rankings down the line, but based on current skills level, potential and talent, here are five fighters who might top the list in five years.