Rafael Nadal vs. Roger Federer: Best moments from captivating rivalry

Rafael Nadal knows what to expect going into a blockbuster semi-final clash against Roger Federer at the Australian Open, but is focused on improving one key area of his game going into the encounter: his serve.

Nadal coughed up seven double-faults and conceded the deep wound was causing him big concerns ahead of a semi-final blockbuster on Friday night with either four-time winner Roger Federer or Wimbledon champion Andy Murray. "Especially with the 

Rafael Nadal celebrates during his quarterfinal match against Grigor Dimitrov. (GREG WOOD/AFP/Getty Images). MELBOURNE, Australia — Everyone knows Rafael Nadal is the most intense, focused, point-by-point 

Maybe every Federer-Nadal is a Federer-Nadal for the ages, and when we look back we'll marvel at our luck that these two comets coincided for a decade. But let's say with a bit of boldness that the upcoming Federer-Nadal 

Rafael Nadal celebrates during his quarterfinal match against Grigor Dimitrov. (GREG WOOD/AFP/Getty Images). MELBOURNE, Australia — Everyone knows Rafael Nadal is the most intense, focused, point-by-point