1. Date of Report[1]: September 21st, 2018

By Rubén A. Báez[2]

Full statistical report in pdf click here

Table 1 shows the summary of the Top 30 performance in the Grand Slams of the 2018 season. The players have been sorted based on the performance ranking or GPI ranking,

starting with the best performance, in this case Rafael Nadal. Nadal has achieved the best overall performance in the four (4) Grand Slams of the current season, followed by

Novak Djokovic and Juan Martin Del Potro. This trio has stood out on the rest of notorious way. We will see this situation more ahead.

In the calculation of the performance ranking the number of matches played has an important weighting. Anyway, as you can see in some cases, those who play more matches will not necessarily get a better performance ranking. In this article I have exposed only the "performance ranking" and not the "general performance index or GPI". As I have explained in previous articles, the Performance Index or General Performance Index serves to sort them from highest to lowest and determine a "ranking". I thought that it is not necessary to expose the indexes. What really matters is to determine the performance ranking (independent of the ATP ranking) to know objectively where each player ispositioned with respect to the others. Obviously, the ranking is calculated for all the players of the season, but for reasons of space I only expose the Top 30 and the Top 10.

One aspect to consider, regarding the reliability of the calculation of the performance ranking in the different aspects could be appreciate in the players chosen to play the Laver Cup. Most of them are in the Top 20 of the best performance. In the Top 10 of the performance ranking there are five of them (Six if we add Del Potro).

Another aspect, already mentioned in previous articles, but is relevant to mention it again, is the relationship that exists between the ATP ranking and the performance ranking or GPI ranking. These two rankings do not necessarily have to coincide, but in general there is a positive correlation (Depending on the degree of regularity of the players taken in the sample. The more regular, the more correlated). In Table 1 note that within the TOP 10 of the performance ranking are included 8 from the Top 10 of the ATP. The emblematic icon is Rafael Nadal, he has obtained the best performance ranking in the Grand Slams this season and is the No. 1 of the ATP ranking too, in this case these two rankings coincide due to the regularity of this exceptional player.

The true performance ranking or GPI ranking we can be calculated it at the end of the current season and at that time we will know which the best performances of 2018 will be taking as reference the totality of the players in the tournaments, ATP, Grand Slams, Davis Cup and Laver Cup.

Full statistical report in pdf click here

[1] Report elaboration based on data from official Websites:

[2] Tennis Instructor Level II (Argentine Tennis Association), Bachelor in Business Administration, Public Accountant, Post grade’s degree in Finance Management and Capital Markets, MBA (IAE Business School, Austral University, Argentina).

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