Rafael Nadal of Spain serves the ball to the tribune after winning the men's semifinal against Tomas Berdych of Czech Republic at the BNP Paribas Open on March 16, 2013 in Indian Wells, California, the United States. Rafael Nadal won 2-0 to enter the final. (Xinhua/Yang Lei)

Rafael Nadal of Spain returns a hit during the men's semifinal against Tomas Berdych of Czech Republic at the BNP Paribas Open on March 16, 2013 in Indian Wells, California, the United States. Rafael Nadal won 2-0 to enter the final. (Xinhua/Yang Lei)

Tomas Berdych of Czech Republic returns a hit during the men's semifinal against Rafael Nadal of Spain at the BNP Paribas Open on March 16, 2013 in Indian Wells, California, the United States. Tomas Berdych lost 0-2. (Xinhua/Yang Lei)

Tomas Berdych of Czech Republic returns a hit during the men's semifinal against Rafael Nadal of Spain at the BNP Paribas Open on March 16, 2013 in Indian Wells, California, the United States. Tomas Berdych lost 0-2. (Xinhua/Yang Lei)

Rafael Nadal of Spain reacts after winning the men's semifinal against Tomas Berdych of Czech Republic at the BNP Paribas Open on March 16, 2013 in Indian Wells, California, the United States. Rafael Nadal won 2-0 to enter the final. (Xinhua/Yang Lei)

Rafael Nadal of Spain competes during the men's semifinal against Tomas Berdych of Czech Republic at the BNP Paribas Open on March 16, 2013 in Indian Wells, California, the United States. Rafael Nadal won 2-0 to enter the final. (Xinhua/Yang Lei)

Rafael Nadal of Spain reacts during the men's semifinal against Tomas Berdych of Czech Republic at the BNP Paribas Open on March 16, 2013 in Indian Wells, California, the United States. Rafael Nadal won 2-0 to enter the final. (Xinhua/Yang Lei)

Rafael Nadal of Spain reacts after winning the men's semifinal against Tomas Berdych of Czech Republic at the BNP Paribas Open on March 16, 2013 in Indian Wells, California, the United States. Rafael Nadal won 2-0 to enter the final. (Xinhua/Yang Lei)

Rafael Nadal of Spain serves the ball to the tribune after winning the men's semifinal against Tomas Berdych of Czech Republic at the BNP Paribas Open on March 16, 2013 in Indian Wells, California, the United States. Rafael Nadal won 2-0 to enter the final. (Xinhua/Yang Lei)

Rafael Nadal of Spain returns a hit during the men's semifinal against Tomas Berdych of Czech Republic at the BNP Paribas Open on March 16, 2013 in Indian Wells, California, the United States. Rafael Nadal won 2-0 to enter the final. (Xinhua/Yang Lei)