Wimbledon champion Iga Swiatek remarked in September that she feels the season is "excessively lengthy and demanding."
When Daria Kasatkina cut short her 2025 season ahead of schedule in October, the one-time elite competitor detailed how she had "encountered a barrier."
"The schedule is too much. My mental and emotional state is frayed, and, sadly, I'm not alone," she stated.
Elina Svitolina of Ukraine, a former Wimbledon final four contender, had already announced she was not in "the right headspace" to carry on, while reigning Grand Slam champions Iga Swiatek and Carlos Alcaraz furthermore think the calendar is excessively lengthy.
This subject remains under discussion as the world's foremost tennis players gather again in Australia for the commencement of the 2026 season.
A slightly longer off-season than 2025 has been received well. Nonetheless, a handful of weeks is not considered adequate time for thorough rest before preparations begin for an eleven-month schedule considered among the most onerous in professional sport.
"Tennis places greater strain on athletes now than it ever has," stated Dr. Robby Sikka, head of medicine at the Professional Tennis Players' Association (PTPA).
"The duration of play has increased, players are faster, they're hitting the ball harder.
"We have a duty to safeguard our athletes and give them a more viable sport."
So what is being done and what further steps could be enacted?
The 2025 season lasted 47 weeks for many players on the ATP circuit, starting with the United Cup team event in late December 2024 and ending with the Davis Cup final in late November.
The women's season concluded two weeks earlier when the WTA Finals wrapped up in early November. The International Tennis Federation moved the Billie Jean King Cup Finals forward to September to help combat scheduling concerns.
The ATP Tour says it does not take the concerns of the players "lightly," while the WTA Tour says player welfare will "consistently be the foremost concern."
That did not appease the PTPA, which commenced proceedings against the men's and women's tours in March, referencing "unfair practices and a clear neglect of athlete well-being."
Overhauling the calendar is an clear answer but cannot be implemented readily given the intricate web 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 more substantial rest period, or can we buy time during the season so there is a brief respite," said 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 reduced the number of events which factor into the rankings for 2026, which it believes will reduce "overall demands" on the players.
"A factor frequently ignored: players select their own tournament plans," commented ATP chairman Andrea Gaudenzi.
"This level of choice is unusual in pro sports. But with that comes accountability - understanding when to compete and when to rest."
Stretching several required events across a fortnight - creating so-called 'mini Slams' - has also been criticized.
"In my view, athletes are more psychologically drained and exhausted because they're being on the road longer," stated Britain's former men's world number one, Andy Murray.
As well as mental burnout, there are worries about the growing physical demands.
Players experience a higher rate of upper-body injuries in certain months, according to player association statistics.
The organization says these "foreseeable patterns" are down to the tour schedule layout and the switches in court surfaces.
When a high-profile game at the Australian Open ended in the early hours in 2023, it seemed set to trigger adjustments.
In 2024, the tours brought in a new rule prohibiting matches starting after 11pm.
But there have continued to be instances of matches concluding long after midnight - which medical experts insist.
"After a match concludes, an athlete's day isn't over," said 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. There is no other sport which mandates that."
Data suggests a player is considerably more susceptible to be injured during a night-session match.
Different tournaments playing with different balls - leading to changes in bounce and speed - has been pointed to as a source of a rise in upper body injuries.
"I've had a lot of injuries in my arm, my shoulder, my wrist," stated one top British player, "and I observe these types of injuries becoming more common."
A former US Open champion, who retired last year with an ongoing wrist injury, thinks tournaments in the same circuit should use one standard ball.
"It shouldn't be too difficult - the same ball for clay, the same for hard and the same for grass. That would be extremely beneficial to the players," he said.
The tours moved towards a more unified ball-approval process during 2025 and project "full alignment" in the coming years.
Athletic performance experts believe tennis must take cues from how American team sports use data to direct the welfare of its stars.
Using data-led analysis, the NFL required consistent playing surfaces and advanced helmet technology to minimize the risk of injury.
"American football has implemented numerous reforms driven by data," said an analytics expert whose firm provides data to monitor player welfare.
"The financial returns have increased dramatically 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 – that model is the exemplar."
Other leagues have enacted regulations aimed at protecting specific positions, limiting their exertion at the professional level and putting age restrictions.
Some retired players believe the stress put on the upper body of tennis players from a very early stage is a key element 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.
"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 speaking out about the demands placed on them.
Current world number ones are among a collection of elite athletes applying force on the Grand Slams with calls for a larger share of revenue, as well as meaningful consultation about the calendar extent, longer competitions 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 exhibition events.
One Grand Slam champion from Britain says the grind is a "challenge" but thinks top players "moaning about the calendar" is not a good look.
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