PARIS (AP) — Jannik Sinner beat Francisco Cerundolo 7-5, 6-1 in the third round of the Paris Masters on Thursday to extend his indoor winning streak to 23 matches and maintain his chances of reclaiming the No. 1 ranking.

The four-time Grand Slam champion needs to win the tournament to take the top spot from Carlos Alcaraz. Sinner’s quarterfinal opponent on Friday will be Ben Shelton.

The fifth-seeded American beat 12th-seeded Andrey Rublev 7-6 (6), 6-3 to secure his place in the eight-man, season-ending ATP Finals in Turin, Italy.

Sinner is chasing a fifth title of the year and 23rd overall. He won an ATP 500 tournament in Vienna last Sunday despite having cramps.

“Hopefully, I can recover physically, which is my main priority” Sinner said ahead of his eighth match against Shelton. “

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