Where Are They Now: Five tennis legends - Björn Borg, John McEnroe, Andre Agassi, Steffi Graf and Pete Sampras - we know their names, we know their legacies, but CNN's Pat Cash digs in to find out what's become of their lives after the spotlights have dimmed. Watch here to find out: http://www.cnn.com/videos/sports/2016/12/19/tennis-legends-where-are-they-now-steffi-graf-andre-agassi-bjorn-borg-pete-sampras-john-mcenroe-orig.cnn #USOpen #BjornBorg #McEnroe #Agassi #Graf #Sampras | US Open Tennis