At the end of 2014, the top 10 players in the Association of Tennis Professional men's rankings list were, in order, Serbia's Novak Djokovic, Switzerland's Roger Federer, Spain's Rafael Nadal, Switzerland's Stan Wawrinka, Japan's Kei Nishikori, Great Britain's Andy Murray, Czechoslovakia's Tomas Berdych, Canada's Milos Raonic, Croatia's Marin Cilic and Spain's David Ferrer. The highest ranking men's player from the United States at the end of 2014 was John Isner, who was ranked 19th. Other American men in the top 100 rankings were Sam Querrey at number 35, Steve Johnson at number 37, Jack Sock at number 42 and Donald Young at number 57.
The ATP began ranking tennis players on August 23, 1973. Ilie Nastase was the organizations first top ranking player, maintaining that position for 40 weeks. Federer holds the record for holding the top position in the ATP ranking for 287 weeks, besting the record set by Pete Sampras by 1 week. Other noteworthy long-term holders of the top ranking include Ivan Ledl at 270 weeks, Jimmy Connors at 268 weeks and John McEnroe at 170 weeks.
Federer also holds the record for the most consecutive weeks at first position at 237 weeks. Other players on that list include Connors at 160 weeks, Lendl at 157 weeks and Sampras at 102 weeks.