An intimate documentary that takes us inside the lives of tennis superstars Venus and Serena Williams, during a year when debilitating injuries and life-threatening illness threatened to take them out of the game once and for all. 《网坛姐妹花》的别名有：大威与小威,威廉姆斯姐妹,维纳斯与塞雷娜,大小威廉姆斯。