Re: Justine and Roger need to learn from each other?
There's a big differenc. Roger is acknowledged as the second best clay court player in the world. Where it not for Rafa, he would probably have at least two FO titles by now. Justine faces a whole slew of opponents who can beat her on grass, Venus, Serena, Maria and who knows how many others.
Besides when you already have 12 majors under your belt, their ain't much you need to learn from anybody.