A scan through the Olympic record books might lead you to believe that Slovaks are born to paddle canoes, South Koreans to fire arrows and the Chinese to tumble off diving boards or over gymnastics apparatus.
Six-times champion Roger Federer produced a vintage display to beat defending champion Novak Djokovic 6-3 3-6 6-4 6-3 in the Wimbledon semi-final on Friday.
