Every man who has held the top spot in singles since the inception of the ATP Tour's rankings on August 23, 1973.
from USATODAY - News Top Stories http://rssfeeds.usatoday.com/~/600306304/0/usatoday-newstopstories~Tennis-Menaposs-singles-players-who-have-held-the-No-ranking-in-ATP-Tour-history/
