Table 1.
Classification of tournaments from professional tennis.
In gray, the tournaments selected for the study.
Table 2.
Types of abandonments in tennis.
Table 3.
Description and type of the variables of interest, regarding the match and tournament.
Table 4.
Description and type of the variables of interest, regarding the players.
Table 5.
Frequency of the match outcome of ATP/WTA database, with the number of observations (N) and the percentage over the total number of matches.
Table 6.
Summary descriptives table by retirement in ATP Tour matches.
Table 7.
Summary descriptives table by retirement in WTA Tour matches.
Table 8.
ATP incidence rates, incidence rate ratio (IRR), risk difference, and the 95% confidence intervals (CI95%), expressed per 1000 games played.
Table 9.
WTA incidence rates, incidence rate ratio (IRR), risk difference, and the 95% confidence intervals (CI95%), expressed per 1000 games played.
Fig 1.
Evolution of the incidence rate in the year-period 1978–2019 in ATP database, with a smooth line in grey.
The incidence rate is expressed as the number of retirements per 1000 games played.
Fig 2.
Evolution of the incidence rate in the year-period 1994–2018 in WTA database, with a smooth line in grey.
The incidence rate is expressed as the number of retirements per 1000 games played.
Fig 3.
Interaction plot between gender and match characteristics of round and surface of play.
Table 10.
Poisson regression model to analyze factors associated with retirements in previous ATP Tour tournaments.
* SE: Standard Error, ** IRR: Incidence Rate Ratio.
Table 11.
Poisson regression model to analyze factors associated with retirements in WTA Tour tournaments.
* SE: Standard Error, ** IRR: Incidence Rate Ratio.