Champion players - like Pete Sampras, Andre Agassi, Steffi Graf and Monica Seles - won Grand Slam after Grand Slam in the 1990s, even as they aged year on year, pushing up the average age of finalists. When they retired, by the first half of the 2000s, the average age of finalists - now a young crop of players - suddenly dipped. That bunch of players -- Federer, Nadal and the Williams sisters - has ruled the sport over the past decade, and with each year, helped push up the average age of Grand Slam finalists again. "The truth is that we still do not know the limits of human endurance and capabilities," Ahuja said. What may work in sports may not work in politics - and the route to success at an older age may vary even between different sports.

Source: The Telegraph January 27, 2017 21:43 UTC