No, I'm not talking about Mayweather vs Pacquaio or other fights that didn't happen. I'm talking about fights that you missed at the time and for whatever reason, haven't got around to watching. Fights before you were born don't count.
Mayweather vs Castillo 1 and 2 are two that I haven't watched yet.
Pacquiao vs Barrera is another. I saw highlights but still haven't caught that one yet.