Serena Williams of the U.S. wins her seventh Sony Open title in singles . The world No . 1 beats China 's world No . 2 Serena Williams is almost unstoppable in Miami . Li Na in straight sets , 75 61 . Li had to save a set point in the opener before cruising in the second . Rafael Nadal plays Novak Djokovic in the men 's final on Sunday .
Serena Williams of the U.S. wins her seventh Sony Open title in singles . The world No . 1 beats China 's world No . 2 Li Na in straight sets , 75 61 . Li had to save a set point in the opener before cruising in the second . Rafael Nadal plays Novak Djokovic in the men 's final on Sunday .