World no. 2 Novak Djokovic was in the driving seat for the year-end no. 1 spot after the Paris Masters, winning the title and 1000 points in the French capital and reducing the gap to Rafael Nadal to 640 points ahead of London.
Seeking the sixth ATP Finals crown, Novak was eager to pass Nadal and earn the year-end no. 1 honor for the sixth time but it wasn't to be for him, losing to Dominic Thiem and Roger Federer to finish the competition in the round-robin stage for the first time in many years.
Thus, the Serb had to settle for the second place on the list, switching focus to the Davis Cup Finals where Serbia reached the quarter-final thanks to his and Filip Krajinovic's dominant victories. Also, Novak is celebrating a massive ranking record this week, becoming only the fourth player with 600 weeks in the top-5 after Roger Federer, Rafael Nadal and Jimmy Connors.
Kicking off the 2007 season from just outside the top-15, Novak claimed the title in Adelaide at the beginning of the year, reaching the final at Indian Wells and lifting the first Masters 1000 crown in Miami, cracking the top-5 on April 30 and celebrating the achievement with the title in Estoril.
Djokovic was the semi-finalist at Roland Garros, earning enough points to return into the top-5 again and staying there for more than ten years, embracing one of the most impressive streaks in tennis as he often stood above his main rivals Roger Federer and Rafael Nadal.
In 2011, Novak Djokovic became world no. 1 following an incredible season, dominating the world of for six years and finally bowing out from the top-5 after the US Open 2017, sidelined since Wimbledon until the end of the season due to an elbow injury that pushed him outside the top-20 in the first half of 2018.
Novak needed precisely a year to return into the top-5 after winning the crown at the US Open 2018, staying there ever since to secure this exclusive ranking record and follow three legends who had achieved it before him.