When a fighter is "prime" what does it mean to "you"?

[Pugilistic]

A fighters prime to me is when a fighter is at the physical and mental peak.

For example, Hopkins prime never started till 1997 imo and his prime continued on till 2004, To some people that may be me excusing his loss to Jones (in 93) And his close losses to Taylor (twice in 2005) and Calzaghe (in 2008 ).