good question rarely do you get these types of questions. um i would say markus bayer. he is a southpaw which will help mikkel and he will help joe becuase he has fought mikkel also. maybe a mundine type charecter for kessler
Mexicamjew got it right - atleast about who is sparringpartners - Wright is a sparringpartner - he uses sparringpartners. Proven jorneymen and young prospects are the usual sparringpartners. Kessler is going to have to traine two things - speed and southpaw. If he can find a sparringspartner that can do both, then that would be great - but there aren't many of those. My guess would be that he is going to be sparring: Eric Teymour and Sergey Tatevosyan. In sparring you can simulate the real thing - if Kessler wants to train his inside skills, then he can let the sparringspartner come in close and not try to stop him on the way in, as he would do in "live" boxing. I don't know which sparringpartners would be relevant to Calzaghe - but a fairly tall boxer with a stif and precise jab. I don't think it's as easy as some people here think - if there was a lot of boxers out there as good as Kessler at what he does, then we would know about them - but as pointed out above Calzaghe can simulate it by letting the sparringspartner get an advantage.
The perfect spaaringspatners for Calzaghe would be two min sparring with Wladimir Klitschko (feel the jab in his face) And I have found the perfect sparring for Kessler - look here: http://shadowboxingla.com/stan_ward.htm
As easy as doing Calzaghe's - but as trying to do Calzaghe's style is not going to be nowhere near the level of the real opponent. But as I can understand Calzaghe doesn't need any sparring - as he has shown versus Veit he can neutralise a jab like Kessler's with ease - so I really don't see the need for him to sparre at all. That will also be a good idea considering his fragile hands...
Dawson was axactly what I was think. Great handspeed, good defence, and big - JC is a pretty big supermiddle. Obviously, he wouldn't be able to get him, but that would be ideal. Adamek for Calzaghe?
Hmmm... just checked Dawson's height - 6ft 3. Kessler would be punching slightly downwards, so he needs someone his own height at most.