When previewing the Serena Williams, Roberta Vinci Semifinal match up there is an important stat that stands out. Vinci has faced many break points during the US Open and saved a high percentage. Look for Serena to try to convert her break points in this matchup for a spot in the US Open Final. Learn more at: http://gamechangersibm.tumblr.com/.
在T站说说你的看法～