Learn the World No. 1 scenarios in Turin

The battle for ATP Year-End No. 1 presented by PIF honours has come down to the season-ending Nitto ATP Finals. Who will finish at the top: Carlos Alcaraz or Jannik Sinner?

Both men have claimed the award once before — Alcaraz in 2022 and Sinner in 2024 — and one will claim the prestigious trophy again.

Alcaraz leads Sinner by 1,050 points in the PIF ATP Live Race To Turin. Whoever finishes Turin with more points in the Live Race will be year-end No. 1.

Carlos Alcaraz and Jannik Sinner are battling for ATP Year-End No. 1 presented by PIF honours at the Nitto ATP Finals.

Carlos Alcaraz must earn more than 450 points in Turin to guarantee himself year-end No. 1 regardless of what Sinner earns. To do that he can:

• Sweep his round-robin matches.

• Reach the final while winning two round-robin matches or one round-robin match.

Speaking on media day Thursday in Turin, Alcaraz said: "Ending as the No. 1, it's been an important goal for me since half the year, to be honest. Because at the beginning I didn't think about it.

"I'm just really motivated to perform well, to play my best tennis, trying to get some wins here, trying to qualify to the semi-finals.

"I think doing good in this tournament, winning matches here, it comes together with ending the year as No. 1. It's kind of the same motivation, they stick together.”

To have any chance of finishing year-end No. 1, Sinner must win the title. There are different permutations of how he can accomplish this.

If Alcaraz wins 0 matches in Turin, Sinner:

• Must win the title while winning at least one-round robin match.

If Alcaraz wins 1 round-robin match in Turin and does not reach the final, Sinner must:

• Win at least two round-robin matches

• Go on to win the title

If Alcaraz wins 2 matches in Turin and does not reach the final, Sinner must:

• Win the title as an undefeated champion

"With the early exit of Carlos in Paris there are some scenarios, which I follow, but at the same time if he plays really well there is no chance, it doesn't matter what my result is," Sinner said.

The 2025 Nitto ATP Finals begins on Sunday in Turin.