Tennis storylines to watch: Nadal's fitness, WTA Finals in Saudi, and which Tiafoe will turn up?
Briefly

Despite his Grand Slam success this year, Carlos Alcaraz faces pressure to perform in the upcoming tournaments, especially with his early exit in recent matches.
Jannik Sinner leads in the race for the year-end world No 1 ranking, but Alcaraz's inconsistency raises questions about his motivation to challenge for that spot.
Read at www.nytimes.com
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