mold that I think I came from also, that you walk out there, you give everything you have from the first point to the end no matter what the score. And you're willing to lay it all out on the line and you're not afraid to let the people see that." Nadal generally plays an aggressive, behind-the-baseline game founded on heavy topspin groundstrokes, consistency, speedy footwork and tenacious court coverage, thus making him an aggressive counterpuncher. Known for his athleticism and speed around the court, Nadal is an excellent defender who hits well on the run, constructing winning plays from seemingly defensive positions. He also plays very fine dropshots, which work especially well because his heavy topspin often forces opponents to the back of the court. Nadal employs a semi-western grip forehand, often with a "lasso-whip" follow-through, where his left arm hits through the ball and finishes above his left shoulder – as opposed to a more traditional finish across the body or around his opposite shoulder. Nadal's forehand groundstroke form allows him to hit shots with heavy topspin – more so than many of his contemporaries. San Francisco tennis researcher John Yandell used a high-speed video camera and special software to count the average number of revolutions of a tennis ball hit full force by Nadal. Yandell concluded: While Nadal's shots tend to land short of the baseline, the characteristically high bounces his forehands achieve tend to mitigate the advantage an opponent would normally gain from capitalizing on a short ball. Although his forehand is based on heavy topspin, he can hit the ball deep and flat with a more orthodox follow through for clean winners. Nadal's serve was initially considered a weak point in his game, although his improvements in both first-serve points won and break points saved since 2005 have allowed him to consistently compete for and win major titles on faster surfaces. Nadal relies on the consistency of his serve to gain a strategic advantage in points, rather than going for service winners. However, before the 2010 US Open, he altered his service motion, arriving in the trophy pose earlier and pulling the racket lower during the trophy pose. Before the 2010 US Open, Nadal modified his service grip to a more continental one. These two changes in his serve increased his average speed by around 10 mph during the 2010 US Open, maxing out at