Since the ATP computerized ranking was introduced in 1973, this page lists the 88 players returned by the API for Top 4, rather than the complete historical total. the all-time leader is Novak Djokovic with 831 weeks, a margin 3% ahead of Roger Federer (804 weeks) and Rafael Nadal (756 weeks). 40 players have accumulated 52 or more weeks inside the Top 4, with an average of 124 weeks across all ranked players.