Year XI, Artícle1], No. 125

December 3rd, 2021

by Rubén A. Báez[2]

Full statistical report in pdf click here

General Performance Index©
(GPI: General Performance Index): "It is an index that measures the performance that a tennis player has had in a given period of time." This index, not shown here, is used to build the "General Performance Index Ranking© or GPI Ranking© ".

This index considers, for its calculation, a number of aspects such as the number of played matches and won, the serves, the points won with the serves, the returns, the break points (saved and won) and the tie-breaks. Once the indexes are calculated for a given period of time, i.e. the 2021 season in this case, these indexes (not shown here) are sorted from the highest to the lowest and a performance ranking is established. This ranking is the General Performance Index Ranking© or GPI Ranking©, which is used to order players by perfor-mance in the analyzed season. As it already mentioned in other articles, the WTA Ranking must not necessarily coincide with the General Performance Index Ranking©, in fact, this rarely happens. This General Per-formance Index Ranking© is very useful because it allows analyzing and quantifying the performance of an athlete in relation to the other players over a period of time.

The best performance of the season has been achieved by the Tusisian Ons Jabeur (TUN), making her the No. 1 in the General Performance Index Ranking© or GPI Ranking© of the 2021 season. The GPI Ranking© podium is completed by Anett Kontaveit (EST) and Aryna Sabalenka (BLR). The latter one has reached, for the second consecutive year, the No. 3 in the GPI Ranking© (Table 2, p.9).

Other players highlighted in the GPI Rank-ing© have been Barbora Krejcikova (CZE), Paula Badosa (ESP), Garbiñe Muguruza (ESP), Belinda Bencic (SUI), Daria Kasatkina (RUS), Elina Svitolina (UKR) and Danielle Collins (USA) whom complete the Top 10 of the GPI Ranking©.
The following categories of tournament, which correspond to the 2021 season, have been included for the determination of the Top 150 of the General Performance In-dex Ranking© or GPI Ranking©: The tournaments are as follows:

• Grand Slams: Australian Open, Roland Garros, Wimbledon y US Open.
• WTA 125.
• WTA 250.
• WTA 500
• WTA 1000

The WTA Ranking of the players, which has been considered for this report, is on Nov 22nd, 2021.

Table 1 shows the variations in the WTA Ranking and GPI Ranking© of the 150 best performing players in the 2021 sea-son. In the Top 10 of the GPI Ranking© we observe that Barbora Krejcikova, Paula Badosa, Belinda Bencic and Daria Kasatkina have been the players who more have advanced (57, 81, 45 and 46 positions, respectively) with respect to the 2020 season. Other players who have had a great performance and who have ad-vanced in the GPI Ranking© over the pre-vious season are:

• Ashleigh Barty (AUS): 47 places ↑
• Jelena Ostapenko (LAT): 40 places ↑
• Jasmine Paolini (ITA): 46 places ↑
• Tereza Martincova(CZE): 69 places ↑
• Angelique Kerber (GER): 48 places ↑
• Sorana Cirstea (ROU): 52 places ↑

For the rest of players, see table 1, p.5.

This season we have the Top 10 of the WTA Ranking within the Top 20 of the GPI Ranking©. Contrary to the 2020 season, this season the Top 10 of the WTA Ranking have performed successfully, their performance has been decisive in placing the tennis players at the highest of the top of the rankings. Some have per-formed exceptionally well.

Full statistical report in pdf click here

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


[2] National Tennis Coach (Argentine Tennis Association), Bachelor of Business Administration, Certified Public Accountant, Post grades of Finance Management and Capital Markets, Master of Business Administration (IAE Business School, Austral University, Buenos Aires, Argentina).





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