IE 11 is not supported. For an optimal experience visit our site on another browser.

Roger Federer and Lindsey Vonn Play Tennis on Alpine Glacier

Roger Federer and Lindsey Vonn scale new heights as they play tennis atop an Alpine glacier.
Image: Swiss tennis player Federer serves a ball to U.S. skier Vonn during a promotional tennis event on the Aletsch glacier at the Jungfraujoch
Roger Federer, left, serves a ball to skier Lindsey Vonn during a promotional tennis event on the Aletsch glacier in Switerland, July 16, 2014. DENIS BALIBOUSE / Reuters

Roger Federer and Lindsey Vonn are used to towering over the sports world but the pair scaled new heights Wednesday as they played tennis atop an Alpine glacier.

17-time Grand Slam winner Federer and Alpine skiing champion Vonn were taking part in a promotional event on a specially-built court on Switzerland's Jungfraujoch, at an altitude of 11,400 feet.