Six-time major champion Carlos Alcaraz has split with his coach Juan Carlos Ferrero in a shock move.

Alcaraz, 22, has worked with his fellow Spaniard since he was a teenager, but announced on Wednesday that the pair have "decided to part ways" before the 2026 season.

Neither the world number one nor Ferrero has given a reason for the split, but BBC Sport understands Ferrero did not want to leave his role.

"Thank you for turning childhood dreams into realities," Alcaraz said in a statement.

"We started this journey when I was barely a kid, and throughout all this time you've accompanied me on an incredible journey, on and off the court.

"I've enjoyed every step of it so much with you."

Alcaraz is aiming to become the youngest man to complete the career Grand Slam at the season-opening Australian Open next month.

He has not outlined how he plans to replace Ferrero, but Samuel Lopez - who joined the team in 2024 and has led Alcaraz when Ferrero missed tournaments for personal reasons - is expected to remain.

Alcaraz started working with former world number one Ferrero when he was 15, training at the 2003 French Open champion's academy, about an hour's drive from Alcaraz's home in Murcia.

Ferrero was persuaded by Alcaraz's agent, Albert Molina, who spotted the youngster aged 11 and convinced international sports agency IMG to manage him a year later, to commit to what he saw as a long-term project.

Ferrero, 45, nurtured Alcaraz's talent and took him into the professional ranks before guiding him to all six of his Grand Slam titles.

Alcaraz claimed his first major at the 2022 US Open, won Wimbledon in 2023, added the French Open and another Wimbledon title in 2024, and then again won the French Open and US Open this year.

"I wish I could have continued," said Ferrero, who once described Alcaraz as his "fourth child".

"I am convinced that good memories and good people always find a way to cross paths again."

Timing of split is curious - analysis

Many did not see the severance of this partnership coming - and certainly not the timing.

The announcement comes little over a month after Alcaraz celebrated finishing as the year-end men's number one with Ferrero and his team at the ATP Finals.

After losing to his great rival Jannik Sinner in the season-ending Turin final, Alcaraz gave no indication of a potential split, saying he was looking forward to analysing his strengths and weaknesses in the off season before 2026.

However, a documentary released last year did show some signs of tension in their undoubtedly strong relationship, which sometimes felt as much father-son as player-coach.

In the series, Ferrero appeared frustrated with his protege's application at certain times and questioned his decision to go to Ibiza after winning the French Open in 2024 - against the advice of Ferrero and his agent Molina.

But, after Alcaraz won this year's US Open in a performance which he described as the best of his career, Ferrero praised the player's growing maturity.

Alcaraz's mind has been known to wander during matches, so it was striking how his laser-focused performances in New York helped him find another level.

Ferrero's constant presence - offering subtle instruction during matches and demanding strict discipline at all times - was key.

But it appears Alcaraz, despite having the finest season of his career, has decided he needs another direction.

The timing is curious, given sources say Ferrero wanted to continue and has not left for personal reasons.

How Alcaraz will evolve without his long-time mentor promises to be one of the most fascinating storylines of 2026.