Headphones’ Emergence Puts Some in a Zone, and Others on Edge – The New York Times

Headphones’ Emergence Puts Some in a Zone, and Others on Edge

Serena Williams, who has an endorsement deal with Beats by Dre, says listening to music on the court helps her prepare.

http://www.nytimes.com/2015/09/09/sports/tennis/headphones-emergence-puts-some-in-a-zone-and-others-on-edge.html?ref=business