Since the ATP computerized ranking was introduced in 1973, 100 players have spent at least one week inside the ATP Top 5. The all-time leader is Novak Djokovic with 860 weeks, followed by Roger Federer (859 weeks) and Rafael Nadal (837 weeks). 55 players have accumulated 52 or more weeks inside the Top 5, with an average of 136 weeks across all ranked players.