Which instances did a fighter win, despite having every possible disadvantage against their oponent? This includes size and age/primes. I can't think of any examples of where this occured, I could probably think of one where heart got them through to victory though.
Robero Duran vs Iran Barkley, age, size, prime no one thopught Duran could do it but he did and actually put Barkley down on the canvas. Durans skill and Greatness were his only advantages.