Rafael Nadal

Djokovic is a twenty-time Grand Slam champion and a record seven-time year-end world No.1. He has been world No. 1 for a record 368 weeks. Djokovic is one of eight one male players to achieve the Career Grand Slam and one of four to achieve the Double Career Grand Slam. He is the only one in tennis history to hold all four major titles on three different surfaces at once and the only player to win all ATP tour Elite tournaments, with him winning each at least twice. Djokovic is widely viewed by many sports analysts, fans and media pundits as one of the three greatest tennis players of all time, often rated alongside Roger Federer and Rafael Nadal, collectively known as the "Big Three" who have dominated Men's tennis for over 18 years. He has reached a joint-record 31 Grand Slam finals (shared with Roger Federer) and played the final of each Grand Slam tournament at least six times, an all-time record. He has won 5 World Tour Finals titles, four of which were won consecutively from 2012 to 2015. Djokovic's 2011 season is considered one of the greatest seasons by a tennis player in the Open Era. Djokovic won 10 titles on 3 different surfaces and defeated Rafael Nadal and Roger Federer a total of ten times collectively, going 10–1 against them. Djokovic went on a 41-match win streak and set a then record of 5 Masters titles won in a season. In 2015 Djokovic won three majors in one season for the second time, improved his record of most Masters won in a season by winning six titles, and finished the year winning his fourth consecutive World Tour Finals title. Djokovic also made the finals of all elite tournaments he played in 2015 defeating 31 Top-10 players along the way (Open Era record) and setting an all-time ATP rankings record. Djokovic's 2015 is seen as the greatest season in the Open Era by many fans and analysts. Djokovic's consistency on the ATP tour is matched only by Roger Federer. Djokovic holds the records of 15 straight finals in a single season, a streak of 11 Masters finals and 18 straight top-tier tournament finals. Djokovic holds the record for ATP ranking points since the 1973 ATP rankings were introduced at 16,950 points, more than the world number 2 and 3 combined. Djokovic has won a record 37 titles in the ATP Masters tournaments. By 2018, he had won Masters titles across all 9 venues where Masters tournaments are held, becoming the first player to achieve the "Career Golden Masters". As a result, he is considered to be the greatest and most accomplished player in ATP Masters history for his versatility and success in winning the Masters tournaments on a consistent basis.