Tracy Austin assessed each of the players competing at the ATP Finals before naming the two she thinks have the best serve.
The upcoming season-ending championships is set to take place in Turin for the fourth time and will commence on November 10.
It will go ahead without defending champion Novak Djokovic, who withdrew from the ATP Finals due to injury.
The eight players who will compete at the event are training hard this week before the action commences on Sunday.
Who does Tracy Austin think has the serve at the ATP Finals?
Tracy Austin appeared on Tennis Channel to discuss the upcoming ATP Finals event.
The likes of Carlos Alcaraz will be considered one of the favourites despite his early exit from the Shanghai and Paris Masters 1000 tournaments.
Also top contenders for the title are World number one Jannik Sinner and Alexander Zverev, who has won the ATP Finals on two previous occasions.
Speaking of these two players, Austin named them as the two ATP Finals competitors with the best serves.
“I am going to go with Sinner. The reason why I would take Sinner is that he wins 91% of his service games, the most of anyone on tour,” the American said.
“Then for Zverev, he averages 71% of his first serves in, and wins 89% of his service games.”

What are Jannik Sinner and Alexander Zverev’s records in 2024?
Sinner has certainly been 2024’s best and most consistent player. The 23-year-old has registered 65 wins this season and has suffered just six defeats, while winning seven titles.
Two of these are Grand Slam titles and in June Sinner became the World number one for the first time.
While Sinner has enjoyed a career-best season, Zverev’s campaign has been a resurgent one following his horrific ankle injury at the 2022 French Open.
The German has failed to reach the quarter-finals at a tournament on just four occasions, showing his consistency throughout the season.
Furthermore, he has climbed back to World number two ranking position and in the process claimed two titles in Rome and Paris, both Masters 1000 events.
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