There are studies on injuries at Grand Slam level that might be useful.
Here is a study for Wimbledon over 10 years
https://bjsm.bmj.com/content/51/7/607
Women are noted to be more prone to injury (both sexes noted to be more prone to carrying chronic injury) and the injury areas more prone are feet and wrist. This data is obviously based on the women doing three sets.
It found :
”Injury rate was lower for male players (17.7 injuries per 1000 sets played) than female players (23.4 injuries per 1000 sets played). There was variability in the numbers of injuries reported by men and women players over the 10-year period”
https://pmc.ncbi.nlm.nih.gov/articles/PMC11015763/
here is a review from the French grand slam. While they have said there is little difference, the raw data does show female people had higher injuries over male people. I don’t believe it is a stretch to surmise that if women were in the court longer for 5 sets this would increase. I cannot remember but I don’t believe the data was reduced to per 1000 sets as the Wimbledon data was. Perhaps they would have concluded differently if it was. Perhaps not.
The numbers recorded were:
”The number of injuries in female and male players was similar (392 vs 358, respectively)”
In the pdf “INJURY TRENDS IN PROFESSIONAL TENNIS ACROSS DIFFERENT”, it also noted that female professional players have a higher rate of injury. And that the zones of injury of feet and wrists, particularly tendons, was common across different studies. Just copy and search for the title. I cannot link it as it is a downloadable.
This link below is from Tennis Australia and it notes that the Australian Open has higher injury rate for female players too (this could be exacerbated by heat too)
https://www.tennis.com.au/wp-content/uploads/2019/02/Injuries_through_elite_pathway_HPEDM_FINAL.pdf
for the Australian figures it noted the rates of 68.9 female and 41.2 male (per 10,000 game exposures). This is also with the female players only playing 3 sets.
Here is a review of the injuries at the Australian Open
https://pubmed.ncbi.nlm.nih.gov/28687543/
Results: Female players experienced more injuries than male players (201.7 vs 148.6). The shoulder (5.1±1.1 injuries per year), foot (3.2±1.1), wrist (3.1±1.5) and knee (3.1±1.1) were the most commonly injured regions among females. Knee (3.5±1.6), ankle (2.3±1.3) and thigh (2.3±1.5) were the most prevalent male injuries. Upper arm injuries and in-event treatment frequency increased by ≥2.4 times in both sexes over the 5-year period. Muscle injuries were most frequent. There was a greater than twofold increase in men and women with stress fractures over the 5-year period. The torso region, including the neck, thoracic spine, trunk and abdominal, lumbar spine, hip and groin, pelvis/buttock, attracted high in-event treatment frequencies in both sexes.
Again the above is based on a three set match.
This link below is a review from Kings College
https://lbsm.co.uk/wp-content/uploads/2022/05/tennis-risk-factors.pdf?srsltid=AfmBOope4np57NdXHwHSmgWZe9FUqNhwEP6YMzSzJiX0VOS8Y-beQkpZ
THE INTRINSIC AND EXTRINSIC RISK FACTORS
FOR INJURY IN PROFESSIONAL TENNIS PLAYERS
ON CLAY AND GRASS COURT: A SYSTEMATIC
REVIEW
This paper has reviewed the studies I linked and others too.
It says this about sex
”Wimbledon competition which is played on grass court reported that injury rate was higher in female players (23.4 injuries per 1000 sets played) than in male players (17.7 injuries per 1000 sets played) [5]. There was no direct comparison of injury rate between clay courts and grass courts in the data of this study, but Hartwell et al. reported the difference between hard courts and clay courts [13]. They suggested that female players were more injured on clay courts (3.4 injuries per 1000 MEs) than male players (3.29 injuries per 1000 MEs), despite the higher injury rate in male players. Female players were four times more injured on clay courts than hard courts*.
Thus, it can be concluded that female tennis players are observed more injuries than male players on clay courts and grass courts, and female players are more injured on clay courts compared to grass courts.”
My reading here is that at three sets female players are already experiencing a higher injury rate. That could be because they are carrying longer term injuries. That all makes sense with what other studies have shown in regards to the injury rates for female athletes at elite level due to the difference in physiology (including the growing information about injuries during the menstrual cycle etc).
Either way, elite women are pushing their bodies to these higher injury levels already at three sets. I understand that in the past some elite female players had stated that five sets would be desirable. Partly that was to encourage greater audiences. I do question whether those same players would say the same now knowing the current reviews.