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TURIN, Italy (AP) — Taylor Fritz got off to a strong start at the ATP Finals by beating late entry Lorenzo Musetti 6-3, 6-4 on Monday.

Fritz reached the final of the tournament for the season's top eight players last year.

Musetti was a late replacement for Novak Djokovic, who withdrew with an injured shoulder after beating the Italian in the Athens final on Saturday.

Read more: Novak Djokovic and Lorenzo Musetti "had a laugh" about surreal final days of ATP Finals race

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Later, defending champion Jannik Sinner was playing Felix Auger-Aliassime in a rematch of their recent Paris Masters final won by Sinner in straight sets.

Sinner and Carlos Alcaraz, who won his opener on Sunday, are still fighting for the year-end No. 1 ranking.

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HIGHLIGHTS: Taylor Fritz snaps skid against Lorenzo Musetti | 2025 ATP Finals RR