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A look at Serena Williams' second serve during the first four rounds at Wimbledon 2015.

By SI.com Staff
July 07, 2015

Even the World No. 1 in women's tennis can be judged by the old tennis adage, "You're only as good as your second serve," which refers to how well you play the points that are considered neutral or even to start off. As Serena continues on her quest for the "Serena Slam" with a title at Wimbledon, the stats show that her second serve has dictated her play. Take a look at Serena's performance on her second serve through the first four rounds at the All England Club in 2015.

Check SI.com's Wimbledon 2015 data hub page throughout the whole tournament for the latest data-driven infographics and charts from IBM, the official technology partner for Wimbledon. IBM captures and analyzes the data that powers all of the Grand Slams, as well as the digital platforms that extend the experience to fans around the world.

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