Statistika – FM
24/05/2016
Cover photo: Corine06
“If Djokovic won the French Open, would you consider him to be the best of all time?” I had asked to friend who loves tennis but has an unexplainable dislike of Djokovic. Predictably this question triggers long and intense debates. It may be unsolvable, however it is a debate still worth having.
As 2016 progressed, Novak Djokovic continued to win, and win, and win. On the eve of the Roland Garros he is eclipsing the competition giving fuel to the Djokovic side of the debate:

Djokovic currently has more points than the world number 2 and 3 combined. He has won a staggering 93% of matches this year reaching the final of every Grand Slam and Masters tournament in the past 12 months, except the 2016 Monaco Masters after a shock upset by Jiří Veselý (ranked 55 at the time).
So what would Novak Djokovic need to do now to be considered the best of all time?
He would need to dominate the game like no player had done before in the Open Era. And there is evidence that this has already been happening.

Names which are frequently thrown into the hat of G.O.A.T are: Pete Sampras, Andre Agassi, Roger Federer, Rafael Nadal and recently Djokovic. As we can see by the rankings of No. 1 vs. No. 2, at one time each of these players (except Nadal) has significantly been above the next best player. A player who for a short time dictated tennis, Lleyton Hewitt, is often undervalued and forgotten about during these conversations; however that is for another time. Since 2005, we can begin to see the era of the “big three” starting. However, this realistically grew from the “big 1” to the “big 2” and then the “big 3”. If Andy Murray continues his strong play, the era may very well be renamed to the “big 4”. After correcting for the rankings for changes in the way the ATP calculates rankings we can graph the absolute difference between the number 1 and 2 ranked players at every point in time, no matter who they be.

Andre Agassi lead on an older Pete Sampras was more than half the lead Djokovic has on Murary. The only comparable time in Open Era tennis history where someone has led the pack by as much as today was in late 2006 when Roger Federer pulled away from the competition with a 6800 (adjusted) ranking points lead over Nadal. What was going on at this time? Federer was playing in what is now considered his peak. He was at his most consistent and won 3 of the 4 Grand Slams, losing to Nadal in the finals of the Roland Garros. The 20 year old Nadal was finding his footing in tennis and had claimed his second French open, he would go on to win 7 of next 8 French Open trophies. Incidentally, it was the year Andre Agassi had retired and it was beginning to look like Nadal would be his replacement.
Today the scene is similar in some ways and wholly different in others. He’s facing two established champions often considered the best two in tennis, the likes of which we haven’t seen before. Federer approaching retirement and Nadal (at the same age as Djokovic) losing steam in contrast to his former dominance. Also a rising star in Andy Murray whose career achievements nearly perfectly mirror Nadal in 2006: 2 grand slam titles and a safe number two spot well behind the number 1. (However, Andy Murray is today 29 and Nadal was 20 in 2006)
An elite player leading the field is also a sign of the times with the recent class of elite players which hold disproportionate tennis ability to the rest of the tour:

The current top 8 has 67% more points than the top 8 would have had 26 years ago. Because of the differences in the environments at which the two reached their peaks (has Djokovic reached his peak yet?) I have formed a view of who has been the most dominant player at one time in history. Novak’s dominance in 2016 is more meaningful and extensive than Roger Federer’s in 2006.
But what makes Djokovic so dominant on the court?

Djokovic presents a challenge for sports statistics. He is good everywhere and bad nowhere but his averages are also less than less highly ranked players on the tour. Though it is expected for these averages to rise, depending on the length of his career.
When looking at the current top 7 players career stats, Djokovic doesn’t stand out in any category. So how can we explain Novak’s strength on the court? It may be the case that he is simply so good because he has no weaknesses. Djokovic may not be the best server, serve returner or most clutch player in history but in 2016 his game has been un-exploitable. An opponent can’t overpower, outspeed, outserve or outsmart him. They can’t play his backhand or forehand or swing him around the court to gain an advantage. It matters little if the opponent approaches the net frequently or sticks to the baseline. Novak Djokovic seems to come out to the court and play the same against Nadal and Ivo Karlovic, and win.
Right now Djokovic is dictating the game. He is currently the favourite to take home all of the Grand Slam trophies this year. The question is how high can he climb?
Notes:
- Analysis on Jeff Sackmann’s Github database
- Pre-2009 rankings adjusted by a factor due to changes in ATP ranking calculation