Jannik Sinner has enjoyed considerable hard-court success since the beginning of 2024, but Fabrice Santoro believes he can also win the Wimbledon and French Open titles.
Before the 2024 Australian Open, the ATP world No. 1 had never reached a Grand Slam final. Since then, his transformation into the world's best-ranked player has been incredible and awe-inspiring.
Sinner's most impressive achievement during that time is undoubtedly winning the last three hard-court Grand Slam finals. The most recent of these was at the 2025 Australian Open, beating Alexander Zverev in the final.
He also won the 2024 ATP Finals, helped Italy secure back-to-back Davis Cup titles, and claimed three Masters 1000 crowns. Those titles were also on hard courts, showing how much the Italian dominated on the surface.
However, Sinner could not achieve the same success on clay and grass. Carlos Alcaraz beat him in the 2024 French Open semifinal and he lost to Daniil Medvedev in the quarterfinal at the 2024 Wimbledon Championships.
Those results have not reduced Santoro's faith in Sinner's ability on those surfaces. During an interview with L'Equipe, the Frenchman reminded fans how close he came against Alcaraz at the French Open and against Stefanos Tsitsipas at the Monte Carlo Masters.
"I don’t know if he’s going to do the Grand Slam but what I do know is that he can win every Grand Slam he plays in. I was already saying that before Roland-Garros last year and he’s made even more progress since then."
"Last year, he lost two matches on clay: the one in Monte-Carlo, where he was robbed – I was in the stands – by a huge refereeing error in the semi-finals. He led 4-1, 30-40 in the third set, on the serve of [Stefanos] Tsitsipas, whose second ball went out 20cm but was not called a fault by the line judge and which Sinner did not challenge."
"Normally, it should be 5–1 and he is almost in the final the next day. During his second defeat, he leads two sets to one against [Carlos] Alcaraz at Roland Garros [semi-finals] and he is above that too. From memory, he misses a very easy smash after a rebound at the beginning of the fourth."
Alcaraz won last year's French Open final in another five-set thriller against Alexander Zverev. That can make it easy to forget how close Sinner was to defeating Alcaraz on the dirt at Roland Garros.
There were also mitigating circumstances surrounding Sinner's Wimbledon quarterfinal loss to Medvedev. The 23-year-old later revealed he was not feeling well during the match and could not compete at 100%.
If the fine margins go Sinner's way and he avoids injuries in the 2025 clay and grass swings, he could triumph at the French Open or Wimbledon, but Alcaraz will be the deserved favorite after winning both titles last year.
Sinner needs to win both those tournaments to secure the Career Grand Slam. Alcaraz only needs the Australian Open to achieve this. The 21-year-old will be the youngest man to do that if he becomes the 2026 Australian Open champion.