Since the ATP computerized ranking was introduced in 1973, 30 players have spent at least one week inside the ATP Top 1. The all-time leader is Novak Djokovic with 428 weeks, a margin 38% ahead of Roger Federer (310 weeks) and Pete Sampras (286 weeks). 14 players have accumulated 52 or more weeks inside the Top 1, with an average of 91 weeks across all ranked players.