Top-ranked star Iga Swiatek stated in September that she considers the season is "excessively lengthy and demanding."
After Daria Kasatkina ended her 2025 season prematurely in October, the former world number eight detailed how she had "encountered a barrier."
"The itinerary is excessive. Mentally and emotionally I'm at breaking point, and, regrettably, I'm not alone," she stated.
The Ukrainian athlete Elina Svitolina, a former Wimbledon final four contender, had previously revealed she was not in "the right headspace" to continue, while sitting Grand Slam champions Iga Swiatek and Carlos Alcaraz furthermore believe the calendar is excessively lengthy.
This subject continues to be debated as the world's top tennis players gather again in Australia for the commencement of the 2026 season.
A marginally increased off-season than 2025 has been welcomed. Nevertheless, a few weeks is not regarded as enough time for adequate recuperation before work commences for an season lasting nearly a year regarded as among the most demanding in professional sport.
"The physical requirements of tennis are more intense than in the past," commented Dr. Robby Sikka, head of medicine at the Professional Tennis Players' Association (PTPA).
"Matches and rallies are longer, players are faster, they're hitting the ball harder.
"It is our obligation to shield the competitors and give them a more viable sport."
So what is being done and what next actions could be enacted?
The 2025 season lasted 47 weeks for many men on tour, beginning with the United Cup team event in late December 2024 and finishing with the Davis Cup final in late November.
The WTA Tour season concluded two weeks earlier when the season-ending championships finished in early November. The ITF moved the Billie Jean King Cup Finals forward to September to address scheduling concerns.
The men's tour states it does not take the concerns of the players "casually," while the women's tour asserts player welfare will "always remain a top priority."
That failed to satisfy 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."
Overhauling the calendar is an apparent fix but cannot be achieved easily given the complex nature of tennis governance, where the four Grand Slams, ATP, WTA, and ITF each have major stakes.
"It is crucial to evaluate whether we can create more time at the end of the year for an longer break, or can we create space during the season so there is a brief respite," noted Dr. Sikka.
Former world number one Andy Roddick, a consistent campaigner for adjustments, says the season should not go past 1 November.
The ATP Tour has cut the number of events which factor into the rankings for 2026, which it believes will diminish "the total burden" on the players.
"One point that often gets overlooked: players determine their own playing calendar," commented ATP chairman Andrea Gaudenzi.
"Such autonomy is uncommon in elite athletics. But with that comes obligation - understanding when to compete and when to rest."
Stretching several mandatory tournaments across a fortnight - creating so-called 'super weeks' - has also been faulted.
"I believe competitors are more worn out mentally and physically because they're away from home for extended periods," said Britain's former men's world number one, Andy Murray.
In addition to mental burnout, there are apprehensions about the growing physical demands.
Players suffer more severe upper-body injuries in particular times of the year, according to player association statistics.
The organization says these "predictable clusters" are down to the tour schedule layout and the switches in court surfaces.
When a memorable contest at the Australian Open concluded in the middle of the night in 2023, it was expected to drive reform.
In 2024, the tours implemented a new rule prohibiting matches commencing later than 11pm.
But there have continued to be instances of matches finishing well past midnight - which medical experts argue must not be glorified.
"Once the final point is played, a player's duties continue," said Dr. Sikka.
"Media interviews, rehabilitation, and treatment are required. Your day doesn't finish until much later.
"The physical and neurological systems lack adequate time to recuperate. There is no other sport which mandates that."
Research indicates a player is 25% more likely to be injured during a evening game.
The use of varying balls at different events - leading to changes in bounce and speed - has been pointed to as a source of more frequent upper body injuries.
"My career has been plagued by injuries to the arm and wrist," said one top British player, "and I'm seeing more and more of these injuries across the tours."
A former US Open champion, who stepped away last year with an ongoing wrist injury, thinks tournaments in the same circuit should use one type of ball.
"Implementing this would not be overly complex - 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 moved towards a more standardized equipment policy during 2025 and anticipate "complete uniformity" in the coming years.
Medical researchers believe tennis must emulate how American team sports use data to inform the wellbeing of its stars.
Based on data-led analysis, the NFL demanded consistent playing surfaces and improved helmet technology to lessen the risk of injury.
"The NFL has made many rule changes based on empirical evidence," said an analytics expert whose firm provides data to monitor player welfare.
"We've seen the economic model is skyrocketing because their games are so competitive and they're maintaining a healthy roster.
"They're putting their money where their mouth is by protecting athletes and allocating major funds β that model is the gold standard."
Other leagues have introduced rules aimed at protecting pitchers, limiting their exertion at the professional level and putting limits for young players.
Some retired players believe the strain put on the upper body of tennis players from a tender age is a significant factor in their injuries later on.
"We start playing from such an early age and have so many repetitions of our groundstrokes," said the former champion.
"At some point it goes on the wrist. Way more players have problems with the wrist. I think the problem is the many, many repetitions."
An rising contingent of players are speaking out about the demands placed on them.
Current world number ones are among a coalition of top players ramping up pressure on the Grand Slams with calls for a bigger piece of the financial pie, as well as meaningful consultation about the tour schedule duration, extended events and scheduling.
Last year, a top-ten American player said it was "unreasonable" he was only able to take one week off before the new season.
Sympathy can be in short supply, though, given top players sometimes commit to lucrative showcase matches.
One Grand Slam champion from Britain says the grind is a "difficulty" but thinks top players "criticizing the calendar" is not a good look.
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