The Olympics are epitomized by up-and-coming stars, wily veterans and defending champions vying for the ultimate prize: Olympic gold. But do such competitions pit today’s competitor against yesterday’s?
Andy Murray, today’s second ranked male tennis player, was once quoted as saying: “I’m not defending a gold medal,” referring to his 2012 victory. “I’ll always keep my gold medal. It’s always going to be there. You don’t have to....