Daily Data Viz: Importance of first serve in the men's gameUS Open 2015: A look at the points won on first serve and second serve for the four quarterfinalists in the bottom half of the men's draw.
Icon / VideoCreated with Sketch.Serena Williams tops sister Venus in three sets in U.S. Open quarterfinal
Icon / VideoCreated with Sketch.The quest continues: Serena beats Venus to keep Grand Slam hopes alive
Icon / VideoCreated with Sketch.U.S. Open Day 8 after dark: Anderson upsets Murray, Federer beats Isner
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