Yet there are rare individuals who defy the perceived limitations of age and prove the amazing capacity of the human body. Some showed incredible durability in their own sport, while others reinvented themselves by taking on new challenges when many thought they were done. Here are 20 athletes who pushed the limits of what we thought was possible, and proved that age doesn always matter so much after all..They want to see these players play. That's a key issue. As far as the medical issues, that's why we continue to do everything we can to make sure the game is safer for our players.

After losing to Roger Federer on NBC's French Open final Sunday, Robin Soderling called Federer "the greatest player in history." So did NBC's John McEnroe, who said Federer is "the greatest of all time." While McEnroe, in the postmatch rain, told Federer "it's a privilege to be standing next to you" he was also practical about the situation "I'll be sending