Maybe the Ferrer match wore Roddick out too much.  When you look at the stats, 20+ winners by Nadal to none for Roddick (off the ground that is) and 8 aces by Roddick to 6 for Nadal.  Roddick would need more than 20 aces and get half the points free for every game.  Roddick lacks the firepower to win off the ground as evidenced by the lack of winners.  In that respect, Isner would have had more success against Rafa only because Isner’s serve is even bigger than Roddick and Isner is used to hitting big shots.  Roddick is used to playing steady.

Roddick tried to approach the net, but either missed the volley or got passed numerous times.  If he won all the points he got his racquet on, maybe it would be close.  But Rafa was a wall and everytime Roddick wanted to be aggressive Nadal either hit a winner or Roddick hit an error.

This despite the fact that Rafa was serving 46% in the first set, a number he elevated to nearly 70% by the end of the match.  Roddick normally serves at this rate, but was only 50% in the first set, and only got up to 60% by the end of the match.  Despite Rafa’s low percentage, he was nowhere close to being broken.

One advantage for Rafa is a quick match compared to Murray’s relatively long match against Isner.  Rafa hardly expended any energy while Murray was on the verge of playing a fifth set.  It shoudn’t have been too fatiguing to play Isner given how short the points are, but the weather was warm, and Isner makes you run because of his hard shots.

Rafa should have the edge because of freshness in his semifinal match.

Federer and Djokovic will play the early match tomorrow (noon) while Murray will play Nadal in the later match.  This will be the third match in a row for Murray and Nadal.  However, Nadal has only lost about 12 games in the last two matches and not dropped a set.