TURIN, Italy — Jannik Sinner and Carlos Alcaraz are poised to add another entry into their rapidly developing rivalry when the ATP Finals open on Sunday without any of the Big Three for the first time in 23 years.
The top-ranked Sinner and No. 3 Alcaraz evenly split the year's Grand Slam titles between them with two apiece and it would be fitting if the pair meet again in Turin.
Sinner and Alcaraz were placed in different groups in Thursday's draw.
The Ilie Nastase Group features Sinner, Daniil Medvedev, Taylor Fritz and Alex de Minaur.
The John Newcombe Group features Alexander Zverev, Alcaraz, Casper Ruud and Andrey Rublev.
After the round-robin stage, the top two finishers in each group advance to the semifinals.
Sinner withdrew from last week's Paris Masters due to a virus and showed up early in Turin for training.
''This is for me the main event of the end of the year,'' Sinner said.