With momentum on his side, reigning UFC featherweight champion Jose Aldo Jr. looks to continue his undefeated tenure within the UFC against Chan Sung Jung at UFC 163 on August 3rd. 

Set to defend the belt in front of his countrymen in Rio de Janeiro, Caio RPB recently caught up with Aldo at a training session to ask him his opinion on the greatest fighter of all time.

The results may surprise you, as Aldo picks Fedor Emelianenko as number one, and even ranks another fighter ahead of his fellow Brazilian Anderson Silva: