TURIN, Italy :Jannik Sinner and Carlos Alcaraz are poised to reignite their rivalry at the ATP Finals, with the year-ending championship that begins on Sunday expected to produce another title showdown between the pair in a season that has belonged to them.

The dominant duo of men's tennis have shared the four Grand Slams this season, facing off in three finals, to set the stage for another encounter in Turin that will decide who walks away from the Inalpi Arena with the bragging rights.

Up for grabs in the Nov. 9-16 finale is the year-end world number one ranking, with Sinner needing a flawless run to remain on top, while Spaniard Alcaraz can leapfrog him with a string of early victories or a run to the final.

"Ending as the world number one has been an important goal for me. In the be

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