Jennifer has a reputation of a good fighter, what I think to be believable. I think Diana had a similar reputation at her time, altough its too long ago for my knowledge. But in the 1950s tourmament somewhere on this site, she was quite bad, I believe (I have checked it, she was only 26th of 32). Of course, she was not yet in her prime then and, when I remember right (I am not gonna check this), this was a point, that was often made, to explain why she loses. But I think, that some of these commenting guys (that are older and wiser than me) also didnt believe in her later toughness. So Dianas reputation is less confirmed than Jennifers. Thats why I predict a close victory for Jennifer.