Serena Williams’ former coach predicts how many Grand Slams Jannik Sinner and Carlos Alcaraz will win in 2025

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Jannik Sinner and Carlos Alcaraz have been the class of the ATP Tour in 2024, winning all four Grand Slam titles.

Sinner won the 2024 Australian Open, defeating Daniil Medvedev in the final, to win his first Grand Slam title.

The Spaniard then fired back by winning the next two Grand Slams, with Alcaraz taking down Novak Djokovic to win a second consecutive Wimbledon crown.

Alcaraz then won the French Open, dominating Alexander Zverev in straight sets to win for the first time at Roland Garros.

Sinner was able to win the final Grand Slam of the year, capping of a season of dominance for the pair, by winning the US Open.

After dominating the ATP Tour in 2024, one tennis legend believes that the pair could do it all over again next season.

Rick Macci thinks Carlos Alcaraz and Jannik Sinner will win all four Grand Slams again in 2025

Serena Williams’ former coach Rick Macci took to X to make his predictions for the Grand Slams in 2025.

“2025 on the ATP Tour look for the Spanish magician [Carlos Alcaraz] and the Italian flame thrower [Jannik Sinner] to both pick up two slams each,” he said.

Macci went on to explain what is different about Alcaraz and Sinner that sets them apart from the rest of the ATP Tour.

“Three out of five sets is a different mental animal,” he said.

“Right now these guys have a similar mental fabric and are cut from a unique mental cloth.”

How long will Jannik Sinner be ATP world number one for?

Sinner has held the world number one ranking for 22 weeks and will be looking to hold on to top spot for as long as possible.

The Italian has secured his spot as year end number one, guaranteeing at least an extra 10 weeks at the summit of the ATP Tour.

His closest challenger Zverev can begin to close the gap with a title in Turin, but would most likely need to back it up with a maiden Grand Slam in Melbourne to take top spot.

Former world number one Alcaraz isn’t too far behind the German, and with less points to defend than Sinner in the new year, he will be hoping to add to the 36 weeks he’s spent as world number one so far.

Sinner, Alcaraz and Zverev will all be competing at this year’s ATP Finals in Turin, with Alcaraz and Zverev drawn in a group together.

Sinner will begin his ATP Finals campaign against Alex de Minaur on Sunday, whilst Alcaraz will face off again Casper Ruud on Monday.