In sparring one person over and over again you get used to each other and if you ever fight someone with the similar style then you're going to benefit from previous knowledge of that style.


But if you fight someone with a different style you may not be able to adapt.


So it's good to know the weaknesses in one style but it's better to prepare yourself vs a variety of styles unless you're going to have a fight with a guy that has a similar style to your opponent. For example Wladimir Klitschko is fighting Tony Thompson a tall southpaw....he's sparred with (my buddy from Winston-Salem) Jonathan Hagler a 6'4 southpaw and TJ Wilson a 6'7 southpaw....it's smart to understand your future opponent but they are only able to do that at the very highest level