Tennis great Mats Wilander has made the “very, very, very bold prediction” that either Carlos Alcaraz or Jannik Sinner will win the calendar Grand Slam in 2025. 

Sinner and Alcaraz split the four Grand Slam titles between them in 2024 to solidify their positions as the two leading players of their generation.

Spain’s Alcaraz completed the French Open-Wimbledon double to take his Grand Slam tally to four, while Italy’s Sinner won his maiden major at the Australian Open before adding the US Open crown.

Sinner, 23, secured his maiden year-end world No 1 finish after securing eight titles in an outstanding 2024 campaign. Alcaraz, who is 21, ended the season as the world No 3, behind Alexander Zverev, after winning four tournaments.

The duo are the only ATP players born after 1996 to win major titles, with 28-year-old Daniil Medvedev, who won the 2021 US Open, the next-youngest.

Alcaraz holds a 6-4 record against Sinner having won all three of the pair’s competitive encounters in 2024 — in Indian Wells, Roland Garros and Beijing.

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Wilander, Alex Corretja, Laura Robson and Tim Henman — former tennis stars who are now pundits — were asked to make their bold predictions for the 2025 season by Eurosport.

Wilander: “My very, very, very bold prediction for 2025 is that Carlos Alcaraz or Jannik Sinner will win the calendar Grand Slam.”

Corretja: “I would like Novak [Djokovic] to win one more major and share a nice moment with Andy [Murray] after he’s stolen so many majors off him.”

Robson: “Jack Draper is going to be in the final of Wimbledon.”

Henman: “I would like to see 10 British players in the top 100. I’ll be watching.”

The only man to win all four major titles in the same season in the Open Era is Australian tennis icon Rod Laver, who achieved the remarkable feat in 1969.

Djokovic is the only man to come close to emulating Laver, having won the first three Grand Slams in 2021 before losing in the US Open final. No other male player has won the first three majors held in a season since Laver.

The Serbian legend did, though, win four straight majors — starting with Wimbledon in 2015 and ending with the 2016 French Open. This makes Djokovic the only man to achieve a non-calendar Grand Slam in the Open Era.

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