Reporters and Major League Baseball employees watch a demonstration of new statistics made possible by technology upgrades at baseball stadiums during an April 20 news conference in New York. Seth Wenig/AP hide caption

itoggle caption Seth Wenig/AP

Britain's Andy Murray plays a return to Canada's Milos Raonic during their singles ATP World Tour tennis finals match Tuesday at the O2 arena in London. Tim Ireland/AP hide caption

itoggle caption Tim Ireland/AP