Rafael Nadal explains why he no longer attempts to hit big serves, like he did at time during his title run at the 2010 U.S. Open.

"I served very fast during all the U.S. Open because I felt that I had the perfect feeling on the serve,” he told reporters at the BNP Paribas Open at Indian Wells. "But the week before in Cincinnati my serve didn't work that well. Because at that moment I was serving fantastic. I had the feeling that to win the U.S. Open I had to serve faster. Worked well in that tournament, but in general, I don't need to serve that fast.

"The problem when I am serving fast, the percentage is going a little bit down. The problem is if I don't serve the perfect serve the ball come back faster, so I need to play a little bit slower game to have the control of the point. And serving that fast I can have more free points, but my mentality and my style of game doesn't go to this way. When I am serving that fast, I tried in another times, but I feel like I am losing a little bit the control of my whole game. That's why I am trying to serve as fast again with the right percentage, and trying to start the point the right way to have the control of the point with my forehand, or try to hit the first ball in a good position with my forehand. Today I can go on court and serve 132 miles with not many problems. The problem is probably is not the right tactic for my game."