Grand Slam winner Iga Swiatek commented in September that she considers the season is "excessively lengthy and demanding."
At the point when Daria Kasatkina concluded her 2025 season ahead of schedule in October, the one-time elite competitor described how she had "reached her limit."
"The itinerary is excessive. Mentally and emotionally I'm at breaking point, and, unfortunately, I'm not alone," she wrote.
Elina Svitolina of Ukraine, a double Wimbledon semi-final participant, had earlier revealed she was not in "the right headspace" to continue, while reigning Grand Slam champions Iga Swiatek and Carlos Alcaraz also believe the calendar is too long.
The topic continues to be debated as the world's leading tennis players assemble once more in Australia for the beginning of the 2026 season.
A slightly longer off-season than 2025 has been received well. Nevertheless, a few weeks is not considered adequate time for proper recuperation before preparations begin for an eleven-month schedule regarded as among the most onerous in professional sport.
"The demands of tennis are harder than ever before," stated Dr. Robby Sikka, chief medical officer at the Professional Tennis Players' Association (PTPA).
"The duration of play has increased, players are faster, they're hitting the ball harder.
"We owe it to our players to protect them and give them a more viable sport."
So what measures are in place and what next actions could be taken?
The 2025 season covered 47 weeks for many players on the ATP circuit, starting with the United Cup team event in late December 2024 and concluding with the Davis Cup final in late November.
The WTA Tour season ended two weeks earlier when the season-ending championships wrapped up in early November. The ITF moved the Billie Jean King Cup Finals forward to September to alleviate scheduling concerns.
The ATP Tour says it does not take the concerns of the players "without seriousness," while WTA leadership notes player welfare will "always remain a top priority."
That did not placate the PTPA, which initiated a lawsuit against the men's and women's tours in March, referencing "restrictive policies and an obvious indifference to player health."
Restructuring the calendar is an apparent fix but cannot be accomplished simply given the complicated structure of tennis governance, where the four Grand Slams, ATP, WTA, and ITF each have major stakes.
"It is crucial to evaluate whether we can reclaim time at the end of the year for an extended off season, or can we create space during the season so there is a mini-break," added Dr. Sikka.
Former world number one Andy Roddick, a long-time advocate for change, says the season should not go past 1 November.
The ATP Tour has cut the number of events which are included in the rankings for 2026, which it is confident will diminish "the cumulative strain" on the players.
"A factor frequently ignored: players choose their own schedules," stated ATP chairman Andrea Gaudenzi.
"Such autonomy is uncommon in elite athletics. But with that comes accountability - understanding when to compete and when to rest."
Extending several required events across a fortnight - creating so-called 'super weeks' - has also been criticized.
"I believe competitors are more worn out mentally and physically because they're spending more days away," stated Britain's former men's world number one, Andy Murray.
In addition to mental burnout, there are apprehensions about the increased physical demands.
Players are more prone to upper-body injuries in specific periods, according to PTPA research.
The organization says these "predictable clusters" are down to the tour schedule layout and the transitions between court surfaces.
When a notable match at the Australian Open concluded in the middle of the night in 2023, it promised to spark change.
In 2024, the tours brought in a new rule preventing matches beginning past 11pm.
But there have continued to be instances of matches ending deep into the night - which medical experts insist.
"After a match concludes, an athlete's day isn't over," explained Dr. Sikka.
"Media interviews, rehabilitation, and treatment are required. Your day doesn't end at midnight.
"The physical and neurological systems lack adequate time to recuperate. This is a unique demand in the sporting world."
Studies show a player is significantly more prone to be injured during a late-finishing contest.
A lack of standardization in tournament equipment - leading to changes in bounce and speed - has been pointed to as a source of a rise in upper body injuries.
"I have suffered numerous arm, shoulder, and wrist issues," commented one top British player, "and I observe these types of injuries becoming more common."
A former US Open champion, who ended his career last year with an chronic wrist problem, argues tournaments in the same circuit should use one standard ball.
"This should be a straightforward solution - the same ball for clay, the same for hard and the same for grass. That would be incredibly useful to the players," he said.
The tours began using a more standardized equipment policy during 2025 and expect "full alignment" in the coming years.
Medical researchers believe tennis must emulate how American team sports use data to guide the health of its stars.
Based on data-led analysis, the NFL required consistent playing surfaces and enhanced helmet technology to reduce the risk of injury.
"The league has altered its regulations using concrete research," said an analytics expert whose firm provides data to monitor player welfare.
"Their commercial success has soared because their games are so competitive and they're ensuring star athletes are available.
"They're putting their money where their mouth is by protecting athletes and allocating major funds – that model is the exemplar."
Other leagues have implemented policies aimed at protecting specific positions, limiting their throws at the professional level and putting limits for young players.
Some retired players believe the load put on the upper body of tennis players from a tender age is a significant factor in their injuries later on.
"We pick up a racket as kids and have so many repetitions of our groundstrokes," said the former champion.
"Eventually, the wrist bears the brunt. Way more players have problems with the wrist. I think the problem is the many, many repetitions."
An growing group of players are finding their voice about the demands placed on them.
Current world number ones are among a coalition of top players increasing demands on the Grand Slams with calls for a larger share of revenue, as well as meaningful consultation about the length of the season, extended events and fixture planning.
Last year, a top-ten American player said it was "absurd" he was only able to take one week off before the new season.
Support is not always forthcoming, though, given top players occasionally sign up for lucrative showcase matches.
One Grand Slam champion from Britain says the daily routine is a "test" but thinks top players "moaning about the calendar" is not a good look.
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Rashid Al-Mansoori is a seasoned journalist with over a decade of experience covering geopolitical events and economic trends across the Arab world.