Novak Djokovic knows a thing or two about overcoming adversity. And it'll be no different in Madrid.
The big-bombing, 6-foot-10 Ivo Karlovic is confident. And that's not necessarily a good sign for his quarterfinal opponent, Roger Federer.
Will Roger Federer's five-set comeback in the last round hinder his performance versus Juan Martin del Potro? Recent history says probably not.